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所属栏目:英汉双解化学
A natural or synthetic polymericelastic material. Natural rubber is a poly-mer of methylbuta-1,3-diene (iso-prene).Various synthetic rubbers aremade by polymerization; for examplechloroprene rubber (from 2-chlorobuta1,3-diene) and silicone rubbers.See als ......(本文共 327 字 ) [阅读本文] >>