来源：学生作业帮 编辑：百度作业网作业帮 分类：英语作业 时间：2024/04/30 06:26:51
英文介绍
乙烯和催化剂等原料在一定条件下反应得到聚乙烯或者聚氯乙烯,然后除杂,净化,熔化加颜料,成形就完成了
Ethylene and catalyst materials such as reaction under certain conditions,and then get polyethylene or PVC removing impurity,purification,melting add pigment,forming is completed
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