API 5L、API 5CTseamless 89*3.5-8 108*4-8 114*5-10 133*4-10 140*5-10 159*4.5-10 168*6-1...

Pipe steel are API 5L X46,API 5L X52,API 5L X56,API 5L X60,API 5L X65,API 5L X70,API...

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