六亚甲基二异氰酸酯 ( HMDI ) 可用在预聚物中代替甲苯二异氰酸酯〔TDI〕.Hexamethylene diisocyanate ( HMDI ) may be used in prepolymer, in place of TDI.柯达叙述了一种直链的活性亚甲基两当量的黄成色剂.Kodak company describes open chain reactive methylene two - equivalent yello...
Knowledge outside day's work is regarded by most men as a gewgaw.大多数人都认为日常生活之外的知识是花里胡哨的东西.Knowledge outside the day's work is regarded by most men as a gewgaw.大部分人把日常工作以外的一切知识统统当作花哨无用的玩意儿....