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sandipan S
sandipan S May 06, 2013
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I've seen these sensors...

Often 3
Occasionally 0
Rarely 1
Never 2
What is it? 5
1 Comment     11 Tags
Similar Photos: Sensors were installed on escalators bus station from Brasilia to help save energy. They work according to the amount of people. Thus, in pe TV Station Tower Nike sensor

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