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  1. danhfromTO

    Noise Reduction in Refinery

    You can kind of treat sound like heat, reducing it via: Absorbtion Reflection Elimination of conduction.
  2. danhfromTO

    Water Blown Polyurethane Foams?

    We've always used CFC- or HCFC-blown Polyurethane Foams, but the HCFC-141b stockpiles are waning and we plan on switching over to one of the so-called water-blown polyurethane foams. Does anyone have any experience with development of water-blown foams? Is it really possible to expand...

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