The technology of vacuum aluminizing casting polypropylene ( CPP ) film and its applications to packaging were discussed.简要论述了真空镀铝流延聚丙烯 ( CPP ) 膜的生产工艺及其在包装上的应用.The RE - aluminizing technique and coating structure of gas ...
夜幕渐渐降临，我们驱车在狭窄的胡同里缓慢前行。As the dusk shaded into night, we drove slowly through narrow alleys.这条胡同的顶头有一家商店.There is a shop at the end of this lane.胡同拐角处有个邮筒.There is a pillar box at the street corner....