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DIN ASTM API Standard SAE1020 Hot/Cold Rolled Fluid Conveying Steel Tube Alloy Carbon Seamless Round Pipe, Find Details and Price about Steel Pipe Seamless Steel Pipe from DIN ASTM API Standard SAE1020 Hot/Cold Rolled Fluid Conveying Steel Tube Alloy Carbon Seamless Round Pipe - Cangzhou Chengsheng Pipeline Equipment Co., Ltd.