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haitao2012铜虫 (小有名气)
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这个膜是什么组分？
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The composition is 77% aliphatic, polyether-based polyurethane with 20% water uptake, 17% aliphatic, polyether-based polyurethane with 60% water uptake, and 6% aliphatic, polyether-based polyurethane with 3% water uptake. 上面描述的三种物质是什么？西格玛公司可以买到，还是需要自己合成？ |
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2楼2015-10-26 09:38:37