multi-layer extrusion是什么意思

用法例句

Multi-layer blown film technology of foreign company is introduced by focusing on Screw,die and blown film cooling system(air ring and IBC),which are key technologies of multi-layer blown film technology.

介绍了多层复合薄膜的优点,重点介绍了多层复合薄膜的主要加工方法多层共挤吹塑薄膜技术。