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vt.使异分子聚合
vi.异分子聚合
1、acetal copolymer sheet───缩醛共聚物片
1、The reaction character of melamine not only reacts with formaldehyde but also copolymerizes with urea and formaldehyde.───三聚氰胺的改性作用在于,它不仅能与JiaQuan反应,而且能与尿素JiaQuan发生共缩聚反应;