表面活性剂有效物质含量的分析检测方法1 表面活性剂离子类型的鉴别表面活性剂的分类通常按

表面活性剂有效物质含量的分析检测方法1 表面活性剂离子类型的鉴别表面活性剂的分类通常按

19 Pages · 2008 · 279 KB · Chinese
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“ Before you speak, let your words pass through three gates: Is it true? Is it necessary? Is it kind? ” ― Rumi
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