综述了世界乙烯装置分离技术特点与最新进展，对顺序流程、前脱乙烷、前脱丙烷等三大乙烯分离流程进行了分析比较。
Recent progress in world ethylene separation technology were reviewed and compared including sequence process, front-end deethanizer process, front-end depropanizer process.
塑料袋和聚苯乙烯是洛杉矶一个大的环境危害。
Plastic bags and Styrofoam are a big environmental hazard in Los Angeles.
聚氯乙烯(PVC)是世界五大通用塑料之一，产量用量极大，应用范围极广。
Polyvinyl chloride (PVC) is the one of the five biggest general plastic, that has very enormous output and consumption.
应用推荐