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LSAW Steel Pipes, API 5L Grb Steel Pipes, X42 manufacturer / supplier in China, offering Straight Seam Welded Steel Pipe LSAW Steel Pipes, ANSI B16.5 A105 Forged Flange, Pipe Steel Flange and Pipe Fitting, Cold Drawn Precision Seamless Steel Tube and so on.Electric Resistance Welding Pipe ,