该聚合体外壳是偏二氯乙烯与丙烯腈的共聚物。
The polymeric shell is a copolymer of a vinylidene chloride and acrylonitrile.
通常以共聚物中含氟单元的氟原子数目来表示，如氟橡胶23，是偏二氟乙烯同三氟氯乙烯的共聚物。
Usually fluorinated copolymer unit, said the number of fluorine atoms, such as fluorine rubber, 23, is a vinylidene fluoride copolymers with chlorotrifluoroethylene.
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