Published by xia, CrystalOct 30,2018

Infrared alarm principle, function and installation method

The infrared alarm can detect the infrared rays emitted by the human body, and is composed of an ...

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Published by xia, CrystalOct 26,2018

How to match the car remote control key and how much?

With the development of the automobile industry, more and more people are starting to have their ...

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