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Re: Stuffs used for detection
On 14 Jul 96 06:32:40 -0800, [email protected] wrote:
>
>In our school library, there is a depository area wherein you deposit your things and get the tag. >Since the library doesn't allow those tags to be brought out from the library, everytime you >brought it out and pass by the door, it will alarm. Does anyone know what stuff is that? How come >it is alarmed? I brought some metals but it wouldn't alarm... Why those tag would alarm them???
Usually they're magnetic...
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