copolycondensation造句

例句与造句

1. Abstract : through copolycondensation method , a phenol - melamine - urea - formaldehyde resin was prepared . the discussion was concentrated on the preparation method of the resin and it ' s application condition in pressing exterior - type medium density fiberboard
   文摘:通过共缩聚的方法，制备了具有良好的耐水性能和胶合性能的苯酚-三聚氰胺-尿素-甲醛树脂。着重讨论了该树脂的制备方法以及在压制室外型中密度纤维板中的应用情况。
2. It's difficult to find copolycondensation in a sentence. 用copolycondensation造句挺难的