Wednesday, March 28, 2018

How Walk-Through Metal Detectors Work

Anyone who has traveled by airplane has probably gone through a walk-through metal detector. These security devices have also been used in schools, sporting events, government offices, and concerts. They are part of a total security system that includes cameras, door access control, and emergency paging systems. Metal detectors are effective and safe. ...
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1 comment:

Fungames said...

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