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Gate of University library which requires student's ID card to get in. This gate has sensor that react to ID card.
Aya K
Aya K May 07, 2013
Gate of University library which requires student's ID card to get in. This gate has sensor that react to ID card.

I've seen these sensors...

Often 8
Occasionally 2
Rarely 2
Never 0
What is it? 0
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