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Introduction to the characteristics of metal password keyboard.
2022-01-05Metal password keyboard is one of the essential devices in the financial cash register system, which is mainly used to input passwords.It is widely used in bank ATM, communication, transportation, government, taxation and other service in...
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The structure of the keyboard
2022-01-05In order to meet the needs of different users, the keyboard shall be divided into the main keyboard area, the numeric keyboard area, the function keyboard area, and the control key area regardless of how the keyboard format ...
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What are the principles of the microphone and receiver of a telephone respectively?
2022-01-05The working principle of the microphone bai is that when a person speaks into the microphone, the acoustic du wave causes the diaphragm zhi to vibrate, and the diaphragm compresses dao carbon particles loosely and tightly. The resista...
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What is an industrial keyboard?
2022-01-05Industrial keyboard is different from the keyboard we usually use.It is widely used in petrochemical industry, machinery manufacturing, transportation, electric power, national defense, military industry, aerospace, Internet, ...
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