The contents are involved with organic synthetical polymer flocculant, natural polymer flocculant and microbic flocculant.
内容涉及合成有机高分子絮凝剂、化学改性天然高分子絮凝剂和微生物絮凝剂；
The contents are involved with organic synthetical polymer flocculant, natural polymer flocculant and microbic flocculant.
内容涉及合成有机高分子絮凝剂、化学改性天然高分子絮凝剂和微生物絮凝剂；
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