Hexamethylene diisocyanate ( HMDI ) may be used in prepolymer, in place of TDI.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〕.R is tetramethylene, pentamethylene, or hexamethylene.R为四甲撑 、 五甲撑或六甲撑.Hexamethylene diisocysnate ( H...
Sixties singing star Petula Clark is making a comeback.60年代的歌星佩杜拉·克拉克复出了。Clark's mother is nonchalant about her role in her son's latest work.克拉克的母亲对自己在儿子最新作品中的角色漠不关心。Mick Clark, alias Sid Brown米克∙克拉克,又名锡德∙布朗...