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45 Degree Bottle Neck
sandipan S
sandipan S May 06, 2013
45 Degree Bottle Neck

I've seen these sensors...

Often 0
Occasionally 1
Rarely 3
Never 7
What is it? 4
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Similar Photos: It's a movement sensor so the light only operates when someone needs it. Used to reduce energy consumption in buildings. Carbon Monoxide Sensor MIT have developed a more efficient photovoltaic solar cell using particles known as quantum dots. <br/>

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