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  1. Insulation

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    October 17, 2014 by 21emak

    Dear viewers on the internet, Insulation can slow the transfer of energy but doesn’t eliminate it, but it is still …
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  2. Energy

    2

    October 13, 2014 by 21emak

    This is a light bulb on the celling in the living room. This light bulb is LED and pretty officiant …
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