A metal detector is an electric device, which allows to detect metal objects in neutral or low-conductive medium due to their conductivity. Security at the.
from Google Alert - metal detectorhttps://www.google.com/url?rct=j&sa=t&url=http://actualinfo.website/2018/02/01/how-does-it-work-metal-detectors/&ct=ga&cd=CAIyGjBmN2Y1NDMwZGU1NzA5Mzc6Y29tOmVuOlVT&usg=AFQjCNF6j8nnW9sVeajuQJ10L8oJWS8UXg
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