retrieving the used plastic film的用法和樣例：
例句
- A new type of cotton stalk shredding and used polythene film collecting combined machine was developed and designed.
摘要研制了棉秸稈切碎及殘膜回收聯(lián)合作業(yè)機。 - The plashcizing and extruding system with both drainning water and venting was developed for recycling waste PO film.
介紹了筆者研制的排水排氣式聚烯烴廢膜回收塑化擠壓系統的結構特征，及該系統所采用的回收工藝。
