由于工业成本限制了溶剂分子内功能基团的种类数，分类枚举法可以避免组合爆炸。
As the industrial cost limits the number of the kinds of function groups in the molecule of the solvent, the combinatorial explosion can be avoided.
测定了接枝物的分子量，计算了接枝物的结构单元数，认为每个氯化聚丙烯链上接上的马来酸酐基团个数在30～67之间；
Construction unit number was calculated by determining molecular weight. About 30-67 MAH units are grafted to a CPP chain.
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