知识贝壳
知识贝壳
所属栏目：英汉双解有机化学
Asynthetic polymer made from ethene. It isproduced in two forms -a soft material oflow density and a harder,higher densityform,which is more rigid. It can be madeby the ZIEGLER PROCESS and thePHILLIPS PROCESS.由乙烯制成的合成聚合物。聚乙烯产品有两种类型,一种是低密度的软材 ......（本文共 242 字 ） [阅读本文] >>