日本黄大片免费完整版

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        Question 1: How is foamed concrete made?
        2015/5/21

        Foam concrete is made by adding a special foam to a cement mortar slurry.

        This foam is made from a foaming agent which a highly concentrated, high efficient, low dosage liquid which is fed with water into an foam generator.

        Inside the generator, the mixture of Foaming agent and wateris blown by compressed air at high pressure through the foaming lance. 

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        日本黄大片免费完整版
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