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weather sensor in advance
Fei C
Fei C May 09, 2013
weather sensor in advance

I've seen these sensors...

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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 sensors in pavement Vehicle detectors are imbedded in the pavement at the approach to the intersection and are used to activate and extend the green displays.

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