聚氯乙烯,[計(jì)] 永久虛電路
In the US millions of IV bags made of PVC are used annually. 美國(guó)每年都使用數(shù)百萬(wàn)個(gè)由聚氯乙烯制成的靜脈注射袋。
Copper conductor PVC insulated PVC sheathed woven shield control cable. 銅芯聚氯乙烯絕緣聚氯乙烯護(hù)套編織屏蔽控制電纜。
