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Published by xia, CrystalMar 07,2019

Infrared detection alarm working principle and related in...

Infrared detection alarm working principle: After installing the detector in the area to be prote...

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Published by xia, CrystalOct 18,2018

Infrared detection alarm working principle and related in...

Infrared alarm working principle: After installing the detector in the area to be protected (such...

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