Situations of preparing isocyanate trimers at home and abroad are mainly introduced.主要介绍国内外异氰酸酯三聚体的制备状况.Polyether - type isocyanate prepolymers are prepared with polyether polyols and tolylene diisocyanate.采用聚醚多元醇和甲苯二异氰酸...
It reckons that rationing would ossify the farm industry.人们认为实行配给制会使农业失去活力。It reckons that rationing would ossify the farm industry...人们认为实行配给制会使农业失去活力。Babies’ skeletons ossify.婴儿的骨骼在硬化。It is easy for the mind to ossify....