acetal (excl.polyvinyl acetal) and its halogenated,sulphonated,nitrated or nitrosated derivatives (or any combination of such derivatives)

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〔化〕乙縮醛(不包括聚乙烯醇縮乙醛)及其鹵化、磺化、硝化或亞硝化衍生物(或這些衍生物的任何結(jié)合) ......(本文共 48 字 )     [閱讀本文] >>


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