热心网友
多种意思：1 永久虚拟电路Permanent Virtual Circuit 2 聚氯乙烯 polyvinyl chloride3 视频投影机 Projecting Video Camera
热心网友
It is a noun - polyvinyl chlorid; A polymer of vinyl used instead of rubber in electric cables; polyvinyl resin.
热心网友
默认的是这个。聚氯乙烯。polyvinyl chloride
热心网友
polyvinyl chloride 聚氯乙稀