plastic lined steel pipe的意思|示意

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塑料内衬钢管

塑料衬里钢管 ... plastic liferaft 塑料救生筏 plastic lined steel pipe 塑料衬里钢管 plastic lousing 塑料罩 ...

衬塑料钢管 ... 衬塑料阀门 plastics-lined valve 衬塑料钢管 plastic lined steel pipe 衬搪瓷阀门 enamel-lined valve ...