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Category of Energy Conservation & Efficiency

I want to learn the manufacturing method of the heat insulating material with

At cold day like today, We understand a house well where heat insulating materials is good. The effect of the heat insulating material is very large. I want to learn the manufacturing method of the heat insulating material with
safe and high performance.

February 13, 2008 5:56 PM by sangxiaocheng(China / Taiwan)

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