... ps closure 矫形外科闭合 ps concrete 预应力混凝土 polystyrene aerosol 聚苯乙烯气溶胶 ...
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PS CONCRETE SERVICES LIMITED 公司名称
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The PS water reducing agent, which is very effective for concrete, has been made from waste poly styrene(WPS) by sulfuric acid of fuming sulfuric acid sulfonation process.
以废聚苯乙烯（WPS）泡沫为原料，采用浓硫酸和发烟硫酸两种磺化方法制备性能良好的砼减水剂。
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