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Packer
Stainless Steel Pipes
API 5CT J55 K55 无缝套管/油管/油田/石油/建筑
Stainless Steel Pipes
API油井套管封隔器
Stainless Steel Pipes
J55/K55/P110/H40/N80/Nue/Eue/R1/R2/R3无缝钢管OCTG套管、油管
Drainage Device
密封装置煤层注水孔
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