retrieving the used plastic film

• 残膜回收

retrieving the used plastic film的用法和样例：

例句

1. A new type of cotton stalk shredding and used polythene film collecting combined machine was developed and designed.
   摘要研制了棉秸秆切碎及残膜回收联合作业机。
2. The plashcizing and extruding system with both drainning water and venting was developed for recycling waste PO film.
   介绍了笔者研制的排水排气式聚烯烃废膜回收塑化挤压系统的结构特征，及该系统所采用的回收工艺。