Knife sharpening is the process of making a knife or similar tool sharp by grinding against a hard, rough surface, typically a stone, or a flexible surface with hard particles, such as sandpaper. Additionally, a leather razor strop, or strop, is often used to straighten and polish an edge. The smaller the angle between the blade and stone, the sharper the knife will be, but the less side force is needed to bend the edge over or chip it off. The angle between the blade and the stone is the edge angle – the angle from the vertical to one of the knife edges, and equals the angle at which the blade is held. The total angle from one side to the other is called the included angle – on a symmetric double-ground edge (a wedge shape), the angle from one edge to the other is thus twice the edge angle. Typical edge angles are about 20° (making the included angle 40° on a double-ground edge). The edge angle for very sharp knives can be as little as 10 degrees (for a 20° included angle). Knives that require a tough edge (such as those that chop) may sharpen at 25° or more.
Different knives are sharpened differently according to grind (edge geometry) and application. For example, surgical scalpels are extremely sharp but fragile, and are generally disposed of, rather than sharpened, after use. Straight razors used for shaving must cut with minimal pressure, and thus must be very sharp with a small angle and often a hollow grind. Typically these are stropped daily or more often. Kitchen knives are less sharp, and generally cut by slicing rather than just pressing, and are steeled daily. At the other extreme, an axe for chopping wood will be less sharp still, and is primarily used to split wood by chopping, not by slicing, and may be reground but will not be sharpened daily. In general, but not always, the harder the material to be cut, the higher (duller) the angle of the edge. It can also be divided into diamond knife sharpener, ceramic knife sharpener and carbide knife sharpener according to the material.
Manual knife sharpeners that are considered to be countertop utensils are also available that are more detailed than the Sharpening Steels. Tools that are built with grinding devices built into plastic or metal cases are often small in size but able to simplify the sharpening activities considerably. Often, the Knife Sharpener will contain a diamond coated abrasive or a tungsten carbide grinding stone for sharpening. A knife is drawn light through the grinding stone at an angle that is preset with the use of guides that keep the knife angle fairly consistent as it is drawn across the sharpening stone. Four to six draws of the blade is usually sufficient to keep the blade well honed. A guard is commonly attached to the sharpener so hands are kept safetly away from the knife blades.
Electric knife sharpeners are another alternative for shapening knifes and are a type of utensil that often simplifies the sharpening process, particularly if the knives are being used frequently for various food cutting activities. Electric sharpeners are designed with basic features for home or moderate use as well as sharpeners built for higher volume usage, such as commercial sharpeners. When selecting consider the size desired, the type of grinding material on the stones, the types of blades that can be sharpened with the device, the safety features, and the ease of cleaning to remove small bits of edge grindings. Lower priced models will contain only one sharpening slot that offer single sharpening features while other models will have sharpening sections for different purposes such as pre-sharpening to remove burrs and old edges before placing the knife in the sharpening or honing section to finish the process. If a knife is to be used only periodically with a minimal amount of cutting, select the lower priced models. However, if the slicing, dicing and cutting chores are frequent, the higher priced or more heavy duty models may be a much better option for keeping all types of knives well sharpened.
And there are also scissor knife sharpener and pocket knife sharpener. The pocket knife sharpener is a compact, packable knife sharpener designed for sharpening on the go. The diamond sharpening plate and ceramic honing rod use built-in angle guides to create a sharp edge anytime, anywhere.
A honing steel, sometimes referred to as sharpening steel, whet steel, sharpening stick, sharpening rod, butcher's steel, and chef's steel, is a steel rod, ceramic sharpening rod, or diamond sharpening rod used to restore the sharpness of dulled edges. They are flat, oval, or round in cross-section and up to 30 centimetres (1 ft) long. The steel and ceramic honing steels may have longitudinal ridges, whereas the diamond-coated steels are smooth but embedded with abrasive diamond particles. Non-abrasive honing rods such as smooth ceramic or ribbed steel are able to remove small amounts of metal via adhesive wear. In normal use, the rod is applied to the blade at a slightly higher angle than that of the bevel, resulting in the formation of a micro-bevel.
Sharpening stones, or whetstones, are used to sharpen the edges of steel tools and implements, such as knives, scissors, scythes, razors, chisels, hand scrapers, and plane blades, through grinding and honing. Such stones come in a wide range of shapes, sizes, and material compositions. They may be flat, for working flat edges, or shaped for more complex edges, such as those associated with some wood carving or woodturning tools. They may be composed of natural quarried material or from man-made material. They come in various grades, which refer to the grit size of the abrasive particles in the stone. (Grit size is given as a number, which indicates the spatial density of the particles; a higher number denotes a higher density and therefore smaller particles, which give a finer finish to the surface of the sharpened object.) Stones intended for use on a workbench are called bench stones, while small, portable ones, whose size makes it hard to draw large blades uniformly over them, especially “in the field,” are called pocket stones. It can be divided into diamond sharpening stone, ceramic sharpening stone and flattening stone, etc.
Also, there are a raft of sharpening accessories, such as knife sharpening guide, sharpening oil and head of electric knife sharpener.

In electronics, a remote control (also known as a remote or clicker) is an electronic device used to operate another device from a distance, usually wirelessly. In consumer electronics, a remote control can be used to operate devices such as a television set, DVD player or other home appliance. A remote control can allow operation of devices that are out of convenient reach for direct operation of controls. They function best when used from a short distance. This is primarily a convenience feature for the user. In some cases, remote controls allow a person to operate a device that they otherwise would not be able to reach, as when a garage door opener is triggered from outside. Early television remote controls (1956–1977) used ultrasonic tones. Present-day remote controls are commonly consumer infrared devices which send digitally-coded pulses of infrared radiation. They control functions such as power, volume, channels, playback, track change, heat, fan speed, and various other features. Remote controls for these devices are usually small wireless handheld objects with an array of buttons. They are used to adjust various settings such as television channel, track number, and volume. The remote control code, and thus the required remote control device, is usually specific to a product line. However, there are universal remotes, which emulate the remote control made for most major brand devices.
A thermostat is a regulating device component which senses the temperature of a physical system and performs actions so that the system's temperature is maintained near a desired setpoint. Thermostats are used in any device or system that heats or cools to a setpoint temperature, examples include building heating, central heating, air conditioners, HVAC systems, water heaters, as well as kitchen equipment including ovens and refrigerators and medical and scientific incubators. In scientific literature, these devices are often broadly classified as thermostatically controlled loads (TCLs). Thermostatically controlled loads comprise roughly 50% of the overall electricity demand in the United States. A thermostat operates as a "closed loop" control device, as it seeks to reduce the error between the desired and measured temperatures. Sometimes a thermostat combines both the sensing and control action elements of a controlled system, such as in an automotive thermostat. The word thermostat is derived from the Greek words θερμός thermos, "hot" and στατός statos, "standing, stationary".
In electrical engineering, a switch is an electrical component that can disconnect or connect the conducting path in an electrical circuit, interrupting the electric current or diverting it from one conductor to another. The most common type of switch is an electromechanical device consisting of one or more sets of movable electrical contacts connected to external circuits. When a pair of contacts is touching current can pass between them, while when the contacts are separated no current can flow. Switches are made in many different configurations; they may have multiple sets of contacts controlled by the same knob or actuator, and the contacts may operate simultaneously, sequentially, or alternately. A switch may be operated manually, for example, a light switch or a keyboard button, or may function as a sensing element to sense the position of a machine part, liquid level, pressure, or temperature, such as a thermostat. Many specialized forms exist, such as the toggle switch, rotary switch, mercury switch, push-button switch, reversing switch, relay, and circuit breaker. A common use is control of lighting, where multiple switches may be wired into one circuit to allow convenient control of light fixtures. Switches in high-powered circuits must have special construction to prevent destructive arcing when they are opened.
Security cameras, also known as video surveillance, is the use of video cameras to transmit a signal to a specific place, on a limited set of monitors. It differs from broadcast television in that the signal is not openly transmitted, though it may employ point-to-point (P2P), point-to-multipoint (P2MP), or mesh wired or wireless links. Even though almost all video cameras fit this definition, the term is most often applied to those used for surveillance in areas that require additional security or ongoing monitoring. (Videotelephony is seldom called "CCTV". Surveillance of the public using CCTV is common in many areas around the world. In recent years, the use of body worn video cameras has been introduced as a new form of surveillance, often used in law enforcement, with cameras located on a police officer's chest or head. Video surveillance has generated significant debate about balancing its use with individuals' right to privacy even when in public.
The names of circuit boards are: ceramic circuit board, alumina ceramic circuit board, aluminum nitride ceramic circuit board, circuit board, PCB board, aluminum substrate, high frequency board, thick copper board, impedance board, PCB, ultra-thin circuit board, ultra-thin circuit board Thin circuit boards, printed (copper etching technology) circuit boards, etc. The circuit board makes the circuit miniaturized and intuitive, and plays an important role in the mass production of fixed circuits and the optimization of the layout of electrical appliances. The circuit board can be called Printed Circuit Board PCB, Flexible Printed Circuit board FPC circuit board (FPC circuit board, also known as flexible circuit board Flexible circuit board is a kind of high reliability made of polyimide or polyester film as the base material. It is an excellent flexible printed circuit board. It has the characteristics of high wiring density, light weight, thin thickness and good bendability.) and reechas, the birth and development of Soft and hard combination plate-FPC and PCB, gave birth to The new product of rigid-flex board. Therefore, the flexible and rigid board is a flexible circuit board and a rigid circuit board, which are combined according to the relevant process requirements after pressing and other processes to form a circuit board with FPC characteristics and PCB characteristics. It has a variety of types, such as dehumidifier circuit boards, thermostat circuit boards, water treatment circuit boards, security camera circuit boards, steam oven circuit boards, vacuum cleaner circuit boards, etc.

Table game has two senses. In a general sense it is any "game played on a table or similar surface, typically with counters, balls, or other playing pieces" as opposed to card games and, sometimes, board games. In the United States, 'table game' is the term used for games of chance such as blackjack, craps, roulette and baccarat that are played against the casino and operated by one or more live croupiers, as opposed to those played on a mechanical device like a slot machine or against other players instead of the casino, such as standard poker. Whichever meaning is used, it should not be confused with tables games which are a family of board games that include backgammon. Sports table games are sports that are played on a tabletop. Unlike tabletop games, sports table games require physical dexterity. Included football table games, pool table games, button football, table tennis game, headis, cue sports, air hockey games, and table basketball games, etc. They are usually played indoors.
Party drinking games are quick mood-boosting games that promote communication, includes novelty drinking games, wooden shot glass server with 6 glasses, 12cups 12balls beer pong game, beer pong set drinking game party cups, drinking decision maker drinking game for adult party, shot glass roulette, roulette shots game, fire extinguisher beer dispenser, ice cubes, large bingo set, dart, etc.
Gamling game set includes poker chip set, the following are its features: (1) PERFECT POKER CHIPS - This poker set is made of top quality materials with a iron insert for a better feel and longer lasting use.Each chip weighs 11.5 grams, the same weight and feel as professional casino-grade chips; (2) DURABLE ALUMINUM CASE - The case is well made of aluminum, lightweight and durable.The aluminum case is easy to carry and convenient for poker chips storage. Included tray inserts keeping each piece in place, and foam inserts to protect poker chips from damage; (3) SUITABLE FOR ALL AGES - Classic poker chip set is an excellent gift choice for people of all ages, which can make the party lively and provide entertainment for your family and friends. Ideal for Texas Holdem, blackjack, tournaments, card clubs or late night poker games; (4) PERFECT POKER CHIP SET FOR BEGINNERS - 100PCS blank chips set is our lowest priced set for people who are budget conscious and do not know whether they want to play poker for a long period of time. It is a good low priced set to begin with.
Board games are tabletop games that typically use pieces moved or placed on a pre-marked board (playing surface) and often include elements of table, card, role-playing, and miniatures games as well. Most feature a competition between two or more players. In checkers, a player wins by capturing all opposing pieces, while Eurogames often end with a calculation of final scores. Pandemic is a cooperative game where players all win or lose as a team, and peg solitaire is a puzzle for one person. There are many varieties of board games. Their representation of real-life situations can range from having no inherent theme, such as checkers, to having a specific theme and narrative, such as Cluedo. Rules can range from the very simple, such as in Snakes and Ladders; to deeply complex, as in Advanced Squad Leader. The time required to learn to play or master a game varies greatly from game to game, but is not necessarily correlated with the number or complexity of rules; games like chess or Go possess relatively simple rulesets, but have great strategic depth.
The Classic Games Glass Chess Set features a glass chessboard with alternating clear glass and frosted glass squares, as well as clear glass and frosted glass chess pieces. This effect gives one set of chess pieces a glossy, smooth look while the other looks and feels more matte. Chess drinking game consists of a lovely, shiny chessboard with small shot glasses with pictures of the different chess pieces on them. Fill the glasses with your drink of choice before you get started. The more important the piece, the bigger the contents.
A beer belt consists of six plastic beverage holders threaded through a nylon belt. The beer belt wearer loads canned or bottled beer into the holders and snaps the adjustable belt around his or her waist. A hops holster may also be slung around the wearer's shoulder for a different effect. Sometimes servers in a bar will serve customers beers pulled from a beer belt or hops holster. The beer belt is an ideal solution for tailgate parties, since it leaves both hands free for other activities. Party-goers and sports fans can load up from a cooler and reload if necessary. The empty cans or bottles can be placed back into the beer belt for easy disposal or recycling. Although considered a novelty or gag gift by some, a basic beer belt can often be purchased at larger beverage stores or through online specialty stores. Some may also be customized with a beer company's logo or a sports team's official colors. A standard beer belt generally retails for $15-$20 US Dollars, although more advanced models with insulated holders can sell for much more. Because the basic elements, a nylon belt and portable cup holders, can be purchased separately, an enterprising beverage drinker might be able to create a homemade beer belt with a few modifications.
There are a raft of funny gifts for you and your friends, such as plastic pin art toy, Toilet Shooting Shooter Game, Mini Soccer Set toilet game, table bell amazon, newton balance ball, basketball games and other sports games. Outdoor games are games (events of one or more person where there is a objective and the possibility of success and failure) played by using all your limbs for sustained periods of time, in the mythical land of "outside", like best bean bag toss game, a lawn game in which players take turns throwing 16 ounce fabric bean bags at a raised platform (board) with a hole in the far end. A bag in the hole scores 3 points, while one on the board scores 1 point.

A grinding wheel is a wheel used for grinding. Grinding wheels are composed of abrasive compounds and are used for various grinding (abrasive cutting) and abrasive machining operations. Such wheels are used in grinding machines. The wheels are generally made with composite material . This consists of coarse-particle aggregate pressed and bonded together by a cementing matrix (called the bond in grinding wheel terminology) to form a solid, circular shape. Various profiles and cross sections are available depending on the intended usage for the wheel. They may also be made from a solid steel or aluminium disc with particles bonded to the surface. Today most grinding wheels are artificial composites made with artificial aggregates, but the history of grinding wheels began with natural composite stones, such as those used for millstones. The manufacture of these wheels is a precise and tightly controlled process, due not only to the inherent safety risks of a spinning disc, but also the composition and uniformity required to prevent that disc from exploding due to the high stresses produced on rotation. Grinding wheels are consumables, although the life span can vary widely depending on the use case, from less than a day to many years. As the wheel cuts, it periodically releases individual grains of abrasive, typically because they grow dull and the increased drag pulls them out of the bond. Fresh grains are exposed in this wear process, which begin the next cycle. The rate of wear in this process is usually very predictable for a given application, and is necessary for good performance.
Drills are cutting tools used to remove material to create holes, almost always of circular cross-section. Drills come in many sizes and shapes and can create different kinds of holes in many different materials. In order to create holes drill bits are usually attached to a drill, which powers them to cut through the workpiece, typically by rotation. The drill will grasp the upper end of a bit called the shank in the chuck. Drills come in standardized drill bit sizes. A comprehensive drill bit and tap size chart lists metric and imperial sized drills alongside the required screw tap sizes. There are also certain specialized drill bits that can create holes with a non-circular cross-section. Most drill bits for consumer use have straight shanks. For heavy duty drilling in industry, bits with tapered shanks are sometimes used. Other types of shank used include hex-shaped, and various proprietary quick release systems. The diameter-to-length ratio of the drill bit is usually between 1:1 and 1:10. Much higher ratios are possible (e.g., "aircraft-length" twist bits, pressured-oil gun drill bits, etc.), but the higher the ratio, the greater the technical challenge of producing good work. The best geometry to use depends upon the properties of the material being drilled.
Grinding is a mechanical method of removing material, refers to the processing method of removing excess material on the workpiece with abrasives and abrasive tools. Grinding is one of the most widely used material removal methods. Grinding processing belongs to finishing processing in mechanical processing (machining is divided into roughing, finishing, heat treatment and other processing methods), with less processing volume and high precision. It is widely used in the machinery manufacturing industry. Carbon tool steel and carburizing and quenching steel parts that have been heat treated and quenched often have a large number of regularly arranged cracks on the surface that is basically perpendicular to the grinding direction during grinding-grinding cracks , it not only affects the appearance of the part, but also directly affects the quality of the part.
Grinding, according to different process purposes and requirements, there are various forms of processing methods. In order to meet the needs of development, grinding technology is developing towards precision, low roughness, high efficiency, high speed and automatic grinding. There are many forms of grinding processing methods. In production, grinding mainly refers to grinding with grinding wheels. In order to facilitate use and management, grinding processing methods are usually divided into four methods according to the grinding processing form and processing objects of grinding machine products:
1. According to the grinding accuracy, it is divided into rough grinding, semi-finishing, fine grinding, mirror grinding and super-finishing.
2. According to the feed form, it is divided into plunge grinding, longitudinal grinding, slow feed grinding, no-feed grinding, constant pressure grinding, and quantitative grinding.
3. According to the grinding form, it can be divided into belt grinding, centerless grinding, face grinding, peripheral grinding, wide grinding wheel grinding, forming grinding, profiling grinding, oscillation grinding, high-speed grinding, strong grinding, Constant pressure grinding, manual grinding, dry grinding, wet grinding, grinding, honing, etc.
4. According to the machined surface, it is divided into cylindrical grinding, internal grinding, surface grinding and sharpening (gear grinding and thread grinding)
In addition, there are many ways to distinguish, for example, according to the type of grinding tools used in grinding: the grinding method of fixed abrasive abrasives and the grinding method of free abrasives. The grinding methods of abrasive abrasive tools mainly include grinding wheel grinding, honing, abrasive belt grinding, electrolytic grinding, etc.; the processing methods of free abrasive grinding mainly include grinding, polishing, jet machining, abrasive flow machining, vibration machining Etc. According to the level of the grinding wheel linear speed Vs, it is divided into: ordinary grinding Vs<45m/s, high-speed grinding 45m/s<=Vs<150m/s and ultra-high-speed grinding>=150m/s. According to the new technology adopted The situation is divided into: magnetic grinding, electrochemical polishing, etc.

The Courses for Early Language Education reflects Xuba Language Enlightenment's value orientation in the process of children's learning of their mother tongue, and it is one aspect of Xuba Language Enlightenment's multi-dimensional value concept. Therefore, the courses for early language education is not a teaching method in a simple sense, nor is it a teaching material for children to learn their mother tongue in the conventional concept. On the contrary, the courses has the universal characteristics of general pedagogy, and then has its own independent system. Therefore, we prefer to regard the language course as a curriculum model for children's diversified learning with language as the carrier.
It is not difficult to find that each part of the courses of language construction involves a wide range of elements that affect the development of educational and teaching activities: the values pursued by educational and teaching activities, the content stipulated in educational and teaching activities, the methods selected for educational and teaching activities, The operation model of education and teaching activities, the basic requirements followed by education and teaching activities, the detection and evaluation system of the quality of education and teaching activities, and the many details that should be paid attention to in the process of education and teaching activities.
The Teaching Products for Early Language Education we provide includes English basic word cards, English advanced word cards, English phonics cards and picture book reading device. English basic word cards also known as XUBA 243 word cards, 243 words are selected which are suitable for English enlightenment. With recto-verso print, the cards are point-reading sensitive and suitable for flashing and point-reading. English advanced word cards, it is composed of 1000 basic words that have been carefully selected, covering the body, home, fruits, vegetables, animals, birds, insects and things of other aspects. Selection follows the principle of commonness, interest and expansion, avoiding the principle of abstract words. English phonics cards contains phoneme cards, joint pronunciation cards, English phonetic cards. The joint pronunciation cards and the English phonetic cards are distinctive cards from Xuba Language, which can help the children to master the joint pronunciation and the English sound parts quickly. Mastering of these cards can lay a good foundation for children's phonics learning. And Teaching Cards for Early Education also happen to cover the three items mentioned above.
Tests for Early Language Education contains two aspects, they are spoken English test young learners and training for spoken English test for young learners. ISET-YL (International Spoken English Test for Young Learners) is developed and supervised by IEERA. Founded in 1965 and headquartered in New York, IEERA is a maker of International Standards for English education, and a guidance provider to English education institutes throughout the world to implement high level English education programs and standards. At present, ISET-YL certificate is accepted in 159 countries or regions. It is recognized and used by over 20 thousand international academies or institutions with 18 million candidates worldwide. This certification enjoys a good reputation of "qualification passport".
Books for Early Language Education consists of Early English Eduaction for Babies, English Words for Children Volume One&Two, Early English Education Instructors Textbook, English Class for Fun 0-3&3-6 Years Old and so on. With native language enlightenment method for babies to increase vocabulary base rapidly and facilitating sound parenting reading habit, these books will help children to easily achieve native English listening ability equivalent to their Chinese level. And also these are a very practical book of words cognition for English enlightenment. Based on Xuba's researches, understandings and practices on children's cognition areas, principles of closing to life, expanding and interest are considered. Words of 31 themes are selected that cover every aspect of children's recognition towards things around them in their early development stages. Main body of these books are all in English to develop children's English thinking. Rich colors and adorable images of the book are helpful for children to accumulate 1000 situational words and phrases easily in their golden stage of recognition.
Peripheral Products for Early Language Education includes little school bag yellow & blue, which can be innovated and has a super capacity, and it is easy to clean for its waterproof properties; and multifunction early education Smart Machine blue & pink, it is only a system, but also an English practice class for children and a personal English AI tutor, who can help children improve their oral English ability before school and in K12, and can perfectly interpret the challenges of K12 oral English test. The content of the system covers 31 versions of K12 textbooks, providing a full set of graded English courses and connecting with the oral English test. And it can also enable the children to do practices in multiple scenes for various oral English tests. By introducing synchronous English textbooks of dozens of publishing houses nationwide, Biba can save your effort and money and acts better than a professional English teacher. It also has the same standard as the National Examination Center. Meanwhile, Biba M15 provides a set of oral cards. For example, for "书本" in English: "BOOK", Biba first reads the standard pronunciation, and then the child listen and repeat. Then Biba can test whether the children's English pronunciation is accurate or not, and makes the whole word pronunciation assessment precisely. If children speak correctly,it will automatically jump onto another word. If you do not speak correctly, Biba will also encourage you to read it again, a test up to three times. The same goes for sentence training. If you still want to listen and repeat, you can press the forward or the backward button, which is super effective for the development of children's language skills.

DIN 41612 was a DIN standard for electrical connectors that are widely used in rack based electrical systems. Standardisation of the connectors is a pre-requisite for open systems, where users expect components from different suppliers to operate together. The most widely known use of DIN 41612 connectors is in the VMEbus and NuBus systems. The standard has withdrawn in favor of international standards IEC 60603-2 and EN 60603-2. DIN 41612 connectors are used in Pancon, STEbus, Futurebus, VMEbus, Multibus II, NuBus, VXI Bus, eurocard TRAM motherboards, and Europe Card Bus, all of which typically use male DIN 41612 connectors on Eurocards plugged into female DIN 41612 on the backplane in a 19-inch rack chassis. The standard describes connectors which may have one, two or three rows of contacts, which are labelled as rows a, b and c. Two row connectors may use rows a+b or rows a+c. The connectors may have 16 or 32 columns, which means that the possible permutations allow 16, 32, 48, 64 or 96 contacts. The rows and columns are on a 0.1 inch (2.54 mm) grid pitch. Insertion and removal force are controlled, and three durability grades are available. Often the female DIN 41612 connectors have press fit contacts rather than solder pin contacts, to avoid thermal shock to the backplane.
A battery holder is one or more compartments or chambers for holding a battery. For dry cells, the holder must also make electrical contact with the battery terminals. For wet cells, cables are often connected to the battery terminals, as is found in automobiles or emergency lighting equipment. A battery holder is either a plastic case with the shape of the housing moulded as a compartment or compartments that accepts a battery or batteries, or a separate plastic holder that is mounted with screws, eyelets, glue, double-sided tape, or other means. Battery holders may have a lid to retain and protect the batteries or may be sealed to prevent damage to circuitry and components from battery leakage. Coiled spring wire or flat tabs that press against the battery terminals are the two most common methods of making the electrical connection inside a holder. External connections on battery holders are usually made by contacts with pins, surface mount feet, solder lugs, or wire leads. Where the battery is expected to last over the life of the product, no holder is necessary, and a tab welded to the battery terminals can be directly soldered to a printed circuit board.
A pin header (or simply header) is a form of electrical connector. A male pin header consists of one or more rows of metal pins molded into a plastic base, often 2.54 mm (0.1 in) apart, though available in many spacings. Male pin headers are cost-effective due to their simplicity. The female counterparts are sometimes known as female socket headers, though there are numerous naming variations of male and female connectors. Historically, headers have sometimes been called "Berg connectors", but headers are manufactured by many companies.
A SCSI connector is used to connect computer parts that use a system called SCSI to communicate with each other. Generally, two connectors, designated male and female, plug together to form a connection which allows two components, such as a computer and a disk drive, to communicate with each other. SCSI connectors can be electrical connectors or optical connectors. There have been a large variety of SCSI connectors in use at one time or another in the computer industry. Twenty-five years of evolution and three major revisions of the standards resulted in requirements for Parallel SCSI connectors that could handle an 8, 16 or 32 bit wide bus running at 5, 10 or 20 megatransfer/s, with conventional or differential signaling. Serial SCSI added another three transport types, each with one or more connector types. Manufacturers have frequently chosen connectors based on factors of size, cost, or convenience at the expense of compatibility.
A card edge connector is the portion of a printed circuit board (PCB) consisting of traces leading to the edge of the board that are intended to plug into a matching socket. The edge connector is a money-saving device because it only requires a single discrete female connector (the male connector is formed out of the edge of the PCB), and they also tend to be fairly robust and durable. They are commonly used in computers for expansion slots for peripheral cards, such as PCI, PCI Express, and AGP cards.
Terminal block is an accessory product used to realize electrical connection, which is divided into the category of connector in industry. With the increasing degree of industrial automation and the stricter and more precise requirements of industrial control, the amount of terminal blocks is gradually increasing. With the development of the electronics industry, the use of terminal blocks is increasing, and there are more and more types. In addition to PCB board terminals, the most widely used ones are hardware terminals, nut terminals, spring terminals and so on. The terminal is used to facilitate the connection of wires. It is actually a piece of metal enclosed in insulating plastic. There are holes at both ends to insert wires. There are screws for fastening or loosening, such as two wires, sometimes Need to connect, sometimes need to be disconnected, then you can use the terminal to connect them, and can be disconnected at any time, without having to solder or twist them together, very convenient and fast. And it is suitable for a large number of wire interconnections. In the power industry, there are special terminal blocks and terminal boxes, all of which are terminal blocks, single-layer, double-layer, current, voltage, common, breakable and so on. A certain crimping area is to ensure reliable contact and to ensure that enough current can pass.
A circular connector is a type of connector whose basic structure is cylindrical and has a circular mating surface. In the interconnection classification, it belongs to category 5 and is used for interconnection between devices. Broadly speaking, it includes low-frequency circular connectors, RF coaxial connectors and audio connectors. The cylindrical structure of the circular connector is inherently robust and provides greater strength than any other shape.
Automotive connectors are a component that electronic engineering technicians often touch. Its function is very simple: it sets up a bridge of communication between the blocked or isolated circuits in the circuit, so that the current flows and the circuit realizes the predetermined function. The form and structure of automotive connectors are ever-changing. They are mainly composed of four basic structural components, namely: contacts, shells (depending on the variety), insulators, and accessories. In the industry, it is usually also called sheath, connector, plastic shell. Board-to-board connectors are the connector products with the strongest transmission capacity among all connector product types, mainly used in power systems, communication networks, financial manufacturing, elevators, industrial automation, medical equipment, office equipment, home appliances, military manufacturing and other industries . An IC socket is an integrated circuit socket mounted on a circuit board, characterized by a plurality of electrical contacts arranged in a plurality of cavities. An integrated circuit socket includes an insulating shell, and the insulating shell has an integrated circuit package accommodating groove in which the integrated circuit package is accommodated. The contacts are embedded in cavities arranged in a matrix arrangement in the accommodating grooves of the integrated circuit package.

Galvanized Light Fixtures, this upscale traditional style fixture can be used on the outside of any home to beautify a porch, deck, patio, garage and more. The anti-flicker high grade Dusk to Dawn photocell automatically turns light on at dusk and turns off the next morning. Simply install it, turn the switch on, and leave it to do its job. This fixture contains a standard medium base (E26) socket and can be adapted to use several styles of light bulbs according to the light and style needs required. It is built to last with reliable quality and a great mix of decorative and functional features such as stainless steel or solid brass mounting hardware and moisture blocking rubber washers. This fixture includes everything you need for a new or to replace an existing light fixture including mounting bracket, junction box screws, corrosion resistant fixture mounting screws and wire nuts. Easy to Install, each fixture comes with full illustrated instructions, making it easy to install for most DIY customers.
The light can be used in commercial areas, residential areas, scenic spots, parks, squares, etc. It can also be used in heavy industrial environments such as marine lighting and external effects. And this kind of light has strong adhesion, heat and cold resistance, clean and environmentally friendly, good safety, stable chemical functions of the raw materials, no harm to the human body. It has anti-rust and oxidation resistance, acid and alkali resistance, and excellent intergranular corrosion resistance. It can be used with confidence in any place and environment.
Good quality outdoor wall lights will allow you to extend the time you can spend outside. They also help to improve security by making it harder for thieves to enter your garden undetected. LED Garden Wall Lights are available in a vast array of styles and finishes, with a number of designs also available with built in security sensors. The combination of PC lampshade and aluminum makes the lamps unique, elegant and sophisticated. Apply PC lampshade to make the light softer, warmer, and protect the eyes. black outdoor lights wall mounted can be applied to unused places, and it is green and environmentally friendly, that is, no heat and no radiation. Using LED light source, compared with incandescent lamps of the same brightness, black outdoor lights wall mounted can save about 80% of electricity. High efficiency, energy saving, environmental protection, recyclable, sturdy and durable, high color temperature, superior color rendering, natural light, no flicker, no glare. In addition to the above, this light is also suitable for anywhere lighting is required.
Outdoor Lawn Lights or garden lighting refers to lights that use outdoor lighting to illuminate private gardens and public landscapes; for the enhancement and purposes of safety, nighttime aesthetics, accessibility, security, recreation and sports, and social and event uses. Light pollution exacerbated by excessive, misdirected or obtrusive use of light, but even carefully used light fundamentally alters natural conditions. As a major side-effect of urbanization, it is blamed for compromising health, disrupting ecosystems and spoiling aesthetic environments.
The public landscape and gardens have been illuminated for as long as interior structures have – for beauty, security, circulation, and social occasions; since ancient times by firelight from wood, candles, and animal-plant oil fells in torches, sconces and lanterns. Since the 17th century's introductions of new interior illumination fuels, the technology has then been used outdoors and in gardens. As systems were developed for power delivery, Gas lighting of the 19th century and electric light of the 20th century became part of exterior functioning and design. Conventionally generated and sourced electricity remains the most used source for landscape lighting in the early twenty-first century. With the combination of increasing demand for more efficient lighting, increasing availability of sustainable designs, global warming considerations, and aesthetic and safety concerns in garden and landscape design the methods and equipment of outdoor illumination have been evolving. The increasing use of LEDs, solar power, low voltage fixtures, energy efficient lamps, and energy-saving lighting design are examples of innovation in the field.
The lights suitable for beautification and lighting decoration in residential communities or public places. Using galvanized or spray paint technology, safe and reliable, energy-saving and environmentally friendly, strong and durable anti-oxidation. This kind of light not only play a lighting effect, bring people a safe and convenient night, but also play a very good green landscape. The soft lighting does not irritate the eyes, but also brings illumination. It can also create a different color atmosphere for the surrounding plants, creating a more eye-catching and beautiful picture, and becoming a beautiful scenery in the city.

A vitamin is an organic molecule (or a set of molecules closely related chemically, i.e. vitamers) that is an essential micronutrient which an organism needs in small quantities for the proper functioning of its metabolism. Essential nutrients cannot be synthesized in the organism, either at all or not in sufficient quantities, and therefore must be obtained through the diet. Vitamin C can be synthesized by some species but not by others; it is not a vitamin in the first instance but is in the second. The term vitamin does not include the three other groups of essential nutrients: minerals, essential fatty acids, and essential amino acids. Most vitamins are not single molecules, but groups of related molecules called vitamers. For example, there are eight vitamers of vitamin E: four tocopherols and four tocotrienols. Some sources list fourteen vitamins, by including choline, but major health organizations list thirteen: vitamin A (as all-trans-retinol, all-trans-retinyl-esters, as well as all-trans-beta-carotene and other provitamin A carotenoids), vitamin B1 (thiamine), vitamin B2 (riboflavin), vitamin B3 (niacin), vitamin B5 (pantothenic acid), vitamin B6 (pyridoxine), vitamin B7 (biotin), vitamin B9 (folic acid or folate), vitamin B12 (cobalamins), vitamin C (ascorbic acid), vitamin D (calciferols), vitamin E (tocopherols and tocotrienols), and vitamin K (phylloquinone and menaquinones).
A veterinary drug (also animal drug) refers to a drug intended for use in the diagnosis, cure, mitigation, treatment, or prevention of disease in animals. Veterinary drugs can be roughly classified into four categories: ① general disease control drugs; ② infectious disease control drugs; ③ internal and external parasitic disease control drugs; ④ (including growth-promoting drugs). Except for biochemical immune products (bacteria, vaccines, serums, antitoxins and toxoids, etc.) for the prevention and treatment of infectious diseases, and special veterinary drugs such as special parasitic drugs for livestock and poultry and growth-promoting drugs, the rest are the same as those for human use, but the dosage , dosage forms and specifications are different. It has long been widely used to control livestock and poultry diseases.
Sweetening agent are food additives that impart sweetness to soft drinks. It can be divided into nutritive sweeteners and non-nutritive sweeteners according to their nutritional value; according to their sweetness, they can be divided into low-sweetness sweeteners and high-sweetness sweeteners; Divided into natural sweeteners and synthetic sweeteners. The main functions of sweetening agent in food are as follows: (1) Taste: Sweetness is one of the indicators of many foods. In order to make food and beverages taste palatable, a certain amount of sweetener needs to be added. (2) For the adjustment and enhancement of flavor, sweetness is generally required in cakes; in beverages, there is a "sugar-acid ratio" for flavor adjustment. Sweeteners allow products to achieve good flavor while retaining fresh flavor. (3) The formation of flavor, sweetness and the flavor of many foods are complementary to each other, and the flavor of many products is produced by the combination of flavor substances and sweeteners, so many foods are added with sweeteners.
Cosmetics are compound mixtures made of various raw materials through reasonable deployment and processing. Cosmetics have a wide variety of raw materials with different properties. According to the raw material properties and uses of cosmetics, it can be roughly divided into two categories: matrix raw materials and auxiliary raw materials. The former is a kind of main raw material of cosmetics, which occupies a large proportion in cosmetic formulations and plays a major functional role in cosmetics. The latter is responsible for shaping, stabilizing or imparting color, fragrance and other properties to cosmetics, which are not used in cosmetic formulations, but are extremely important. Cosmetics are chemical mixtures made of natural, synthetic or extracted substances with different functions as raw materials and processed through production procedures such as heating, stirring and emulsification.
API refers to active pharmaceutical ingredent, includes human growth hormone powder, pure minoxidil powder, paracetamol powder and acetylsalicylic acid powder. It indicate that the raw materials used for the production of various preparations, the active ingredients in the preparations, and various powders, crystals, extracts, etc., prepared by chemical synthesis, plant extraction or biotechnology for medicinal purposes. Substances that the patient cannot take directly.
Natural active ingredient refers to active ingredients extracted from natural products, such as oyster meat powder, bulk krill oil, tomato lycopene extract powder, etc. Chemical products are the species formed from chemical reactions. During a chemical reaction reactants are transformed into products after passing through a high energy transition state. This process results in the consumption of the reactants. It can be a spontaneous reaction or mediated by catalysts which lower the energy of the transition state, and by solvents which provide the chemical environment necessary for the reaction to take place. When represented in chemical equations products are by convention drawn on the right-hand side, even in the case of reversible reactions. The properties of products such as their energies help determine several characteristics of a chemical reaction such as whether the reaction is exergonic or endergonic. Additionally the properties of a product can make it easier to extract and purify following a chemical reaction, especially if the product has a different state of matter than the reactants. Reactants are molecular materials used to create chemical reactions. The atoms aren't created or destroyed. The materials are reactive and reactants are rearranging during a chemical reaction. Here is an example of reactants: CH4 + O2. A non-example is CO2 + H2O or "energy".
Food additives are substances added to food to preserve flavor or enhance taste, appearance, or other sensory qualities. Some additives have been used for centuries as part of an effort to preserve food, for example vinegar (pickling), salt (salting), smoke (smoking), sugar (crystallization), etc. This allows for longer-lasting foods such as bacon, sweets or wines. With the advent of processed foods in the second half of the twentieth century, many additives have been introduced, of both natural and artificial origin. Food additives also include substances that may be introduced to food indirectly (called "indirect additives") in the manufacturing process, through packaging, or during storage or transport.

A basin used for washing, (now) particularly a permanently installed sink, fitted with a water supply and a drain, for washing the hands and face. It can be made of various materials, such as ceramic wash basins that are very common choice among many households in Singapore. Although in recent years, market have been flooded with many different types of bathroom sinks and vanities creating confusion for homeowners on choosing the right products. However, ceramic wash basin are still the most popular choice among most families. Simply because of its core advantages that is irreplaceable. Ceramic have been tested through time and can last really long so there is absoultely no doubt about its durability even after many years of excessive use. It’s resistance to stain makes cleaning easy which is one of the main reasons people choose to use ceramic basins. On top of that, it's eco friendly yet cost effective since not much maintenance is required.
The vanity washbasin enriches the washing area with lots of storage space. Together with the matching furniture, the vanity washbasin gives you an especially elegant and uniform look. The cabinet module and the shelving space ensure plenty of space for daily bathroom utensils. They offer lots of practical and easy to clean shelving space, perfect for a family bathroom as a double washbasin.
The matt color counter top wash basin is resistant to cracks, scratches, fading, heat and wear. The simple design with mat color make luxury bathroom .It is popular in Europe. All the glossy white design can have matt white or matt black color. As well as wall mounted wash basin, glossy white counter top wash basin and mable pattern wash basin.
A toilet is a piece of sanitary hardware that collects human urine and feces, and sometimes toilet paper, usually for disposal. Flush toilets use water, while dry or non-flush toilets do not. They can be designed for a sitting position popular in Europe and North America with a toilet seat, with additional considerations for those with disabilities, or for a squatting posture more popular in Asia (see squat toilet). In urban areas, flush toilets are usually connected to a sewer system that leads to septic tanks in isolated areas. The waste is known as blackwater and the combined effluent including other sources is sewage. Dry toilets are connected to a pit, removable container, composting chamber, or other storage and treatment device, including urine diversion with a urine-diverting toilet. The technology used for modern toilets varies. Toilets are commonly made of ceramic (porcelain), concrete, plastic, or wood. Newer toilet technologies include dual flushing, low flushing, toilet seat warming, self-cleaning, female urinals and waterless urinals. Japan is known for its toilet technology. Airplane toilets are specially designed to operate in the air. The need to maintain anal hygiene post-defecation is universally recognized and toilet paper (often held by a toilet roll holder), which may also be used to wipe the vulva after urination, is widely used (as well as bidets).
The wall hung toilet uses an edgeless toilet design, which can effectively prevent dirt from accumulating in the toilet. Since the toilet has no rims, there are no hidden cavities This makes the inner surface much easier to clean compared to a conventional toilet. And compared to conventional PP (Polypropylene) seat covers, UF (Urea-Formaldehyde) seat covers are high quality and scratch-resistant. UF seat covers are easy to clean and do not lose their shine even after years of use. At the same time, due to the different surface materials, this toilet can be divided into matt color wall hung toilet and glossy white wall hung toilet.
A dual flush toilet is a variation of the flush toilet that uses two buttons or a handle mechanism to flush different amounts of water. A lesser amount of water is designed to flush liquid waste and the larger quantity of water is designed to flush solid waste. The system was developed by Japanese sanitary product manufacturer TOTO in 1960. It was equipped with two levers and built-in hand-washer, and was also revolutionary in that it reused the water in the hand-washer for flushing. However, it was not well known outside, or even within, Japan. In 1976, American industrial designer Victor Papanek proposed the dual flush system in his book Design for the real world, but the first practical implementation was designed in 1980, by staff at the Australian sanitary-ware company Caroma, with flush volumes of 11 and 5.5 litres. The design caught on, and a redesign in 1994 cut water usage to 6 and 3 litres. The dual-flush toilet has become almost universally adopted in Australia, New Zealand, Singapore, and Israel, with its use in new buildings often mandated by legislation in those countries. The more complex dual-flush mechanism is more expensive than many other types of low-flush toilets. A typical flush toilet is a ceramic bowl (pan) connected on the "up" side to a cistern (tank) that enables rapid filling with water, and on the "down" side to a drain pipe that removes the effluent. When a toilet is flushed, the sewage should flow into a septic tank or into a system connected to a sewage treatment plant.
Toilets are an integral part of any bathroom. Whether you’re in the midst of a remodel or your old toilet is leaking and needs replacing, you'll be faced with several options when choosing a new bathroom fixture. Toilets come in many shapes, sizes, and styles, including one-piece and two-piece toilets. Traditionally, toilets were made with a tank and bowl bolted together, and some are still sold this way. However, recently one-piece toilets have become an option. A two piece toilet has a separate tank and bowl, while a one piece is all connected. But there are other differences, too. One piece toilets are typically heavier and easier to clean, and there’s less space for bacteria to grow. Because two piece toilets feature a detachable tank, they're more customizable for preferred styles and heights. Both styles can include bells and whistles like bidet attachments or low-flow energy saving. Also, either can be shaped in the standard styles: elongated, which is slightly longer, and round. Because one piece toilets are heavier, they can be more expensive to ship if you order one online. Both toilets work well.

A headband is a clothing accessory worn in the hair or around the forehead, usually to hold hair away from the face or eyes. Headbands generally consist of a loop of elastic material or a horseshoe-shaped piece of flexible plastic or metal. They come in assorted shapes and sizes and are used for both fashion and practical or utilitarian purposes. In the UK, horseshoe-shaped headbands are sometimes called "Alice bands" after the headbands that Alice is often depicted wearing in through the Looking-Glass. There are many materials used for headbands such as wood, leather, plastic, metal, fabric, hemp, teeth, human and animal hair, bone, and novelty materials. The leather headbands are usually glued onto a harder plastic headband, or they are hand-stitched. Plastic headbands, which are most common, can be wavy, straight or angled and come in many colours. Metal can be used to form and support leather headbands. Metal-only headbands may be plain or decorated, sometimes with precious jewels. Fabric headbands are comfortable because they do not dig into the head. They usually have an elastic band, so that the headband forms to the head. Toothed headbands have comb-like teeth that are connected to the top part of the headband. Their teeth ensure that the hair stays in place.
Makeup headband could keep the hair looking fresh while brushing the teeth, washing the face, applying makeup or even in a quick shower. They are ideal for taming those flyaways whilst doing your makeup, stopping a face mask going in your hair, and just generally keeping your hair out of your way during your everyday make-up and skincare routines.
Headbands, or sport headbands, are worn around the forehead during physical activity to absorb sweat and keep it from reaching the eyes. Sweatbands are often made of a continuous loop of terrycloth, as it is a particularly absorbent fabric. Folded bandanas, usually knotted behind the head, also serve this purpose. Headbands are usually used for sports but have not been popular since the late 1970s or early 1980s. LeBron James is one of the most notable players who wears a headband during basketball games. They also come in the form of wristbands.
Hair claws, as the term suggests, are hair clips that are shaped like claws. Basically, two claws are joint together by means of a spring, which helps to open and close the claw clip while also holding the hair firmly. Due to their shapes, hair claw clips enjoy a considerable reputation when it comes to following trendy fashion and hairdos. Hair claw clips are also known as hair jaws. Hair claws are ideal for on-the-go and easy hairstyles. This hair accessory is pretty classy yet straightforward. It offers you an excellent alternative to don a formal updo or casually holding the hair at one place for carrying out home chores. Their versatility is the reason why women drool over them. Owing to their widespread popularity, millions of hair claw clips are embellishing the hairstyles of women across the globe. Although it seems pretty simple to put on a hair claw since all you need to do is pressing the rear end of the claw clip to open its jaws and attach them to the hair. The material of hair claws can be divided into many kinds, such as plastic hair claws, metal hair claws, etc.
The face mask is a kind of hygiene product, which is generally worn on the mouth and nose to filter the air entering the mouth and nose to block harmful gases, odors, droplets, viruses and other substances. It is made of gauze or paper and other materials. Masks have a certain filtering effect on the air entering the lungs. Wearing masks has a very good effect when working in a polluted environment such as dust when respiratory infectious diseases are prevalent. Masks can be divided into air filter masks and air supply masks. It can also be divided into disposal facemasks, cotton facemasks and silk facemasks according to the material. But compared with the latter two, disposal facemasks are more hygienic and safer in the current situation of COVID-19.
A scarf, plural scarves, is a piece of fabric worn around the neck or head for warmth, sun protection, cleanliness, fashion, religious reasons, or used to show the support for a sports club or team. They can be made in a variety of different materials such as wool, linen, silk or cotton. It is a common type of neckwear. Scarves have been worn since ancient times. The Statue of Ashurnasirpal II from the 9th century BC features the emperor wearing a shawl. In Ancient Rome, the garment was used to keep clean rather than warm. It was called a focale or sudarium (sudarium from the Latin for "sweat cloth"), and was used to wipe the sweat from the neck and face in hot weather. They were originally worn by men around their neck or tied to their belt.
In later times, scarves were also worn by soldiers of all ranks in Croatia around the 17th century. The only difference in the soldiers' scarves that designated a difference in rank was that the officers had silk scarves whilst the other ranks were issued with cotton scarves. Some of the Croatian soldiers served as mercenaries with the French forces. The men's scarves were sometimes referred to as "cravats" (from the French cravate, meaning "Croat"), and were the precursor of the necktie. The scarf became a real fashion accessory by the early 19th century for both men and women. By the middle of the 20th century, scarves became one of the most essential and versatile clothing accessories for both men and women. Scarves can be divided into hijab scarf, fashion scarf, soccer scarf, silk scarf and so on.
A hat&cap is a head covering which is worn for various reasons, including protection against weather conditions, ceremonial reasons such as university graduation, religious reasons, safety, or as a fashion accessory. In the past, hats were an indicator of social status. In the military, hats may denote nationality, branch of service, rank or regiment. Police typically wear distinctive hats such as peaked caps or brimmed hats, such as those worn by the Royal Canadian Mounted Police. Some hats have a protective function. As examples, the hard hat protects construction workers' heads from injury by falling objects, a British police Custodian helmet protects the officer's head, a sun hat shades the face and shoulders from the sun, a cowboy hat protects against sun and rain and an ushanka fur hat with fold-down earflaps keeps the head and ears warm. Some hats are worn for ceremonial purposes, such as the mortarboard, which is worn (or carried) during university graduation ceremonies. Some hats are worn by members of a certain profession, such as the Toque worn by chefs. Some hats have religious functions, such as the mitres worn by Bishops and the turban worn by Sikhs. Also, it can be divided into bonnets, beanie, sports caps, etc.