内衬塑料管
lining a plastic tube onto internal wall of pipeli
耐油塑料管
oil-resistant plastic pipe
塑料衬里镀锌铁管
galvanized iron pipe with polyvinyl chloride lining
塑料油管接头
plastic oil pipeline joints
有塑料衬里的泵
internally plastic coated pump
聚氯乙烯衬里油管
polyvinyl chloride lined tubing
ABS工程塑料管
ABS engineering plastic pipe