Philip began to scoop grain into his polythene bag.

飞利浦开始用铲子往塑料袋里装粮食。

This polythene sheet should serve to keep out the rain for a while.

这种聚乙烯塑料应该一儿。

Three-dimensional flow field in the elutriator of polythene packed system is simulated based on the standard k-e model provided by FLUENT, is studied firstly to improve the separation efficiency.

一步提高聚乙烯粒料包装系统淘析器的分离效率,对系统内气相流场行了研究和分析。