常见例句In the US millions of IV bags made of PVC are used annually.美国每年都使用数百万个由聚氯乙烯制成的静脉注射袋。Copper conductor PVC insulated PVC sheathed woven shield control cable.铜芯聚氯乙烯绝缘聚氯乙烯护套编织屏蔽控制电缆。 返回 PVC