toluylene diisocyanate 中文意思是什麼
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Plastics. basic materials for polyurethanes. determination of the ratio of 2, 4 and 2, 6 isomers in the toluylene diisocyanate by infra - red spectroscopy
塑料製品.聚氨基甲酸酯塑料.用紅外線光譜法測定二異氰酸二苯乙烯中2 4和2 6異構體的含量
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