cyano-polyester-plastics heat insulation pipe
保温管补口 heat preservation pipe patch cut 氰聚塑保温管 cyano-polyester-plastics heat insulation pipe ; plastics heat insulation pipe 聚氨酯预制直埋保温管 WHAXT ..
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plastics heat insulation pipe
... integrated heat insulation pipe 一体化保温管 plastics heat insulation pipe 氰聚塑保温管 direct-buried insulation pipe 直埋保温管道 ...
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