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Alloy seamless steel pipe(100)
Black Steel Pipe-ASTM A53 GRB(100)
Fluid Pipe-ASTM A106 GRB,API 5L GRB(100)
High press boiler pipe(100)
Large-diameter thick-walled seamless tube(100)
Mechanical tubes ASTM A106 ,STPG370,ST52(100)
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Manager Xu

Manager Xu

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