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China new steel holding group co., Ltd is one of the largest iron and steel productio...
ERW: D: 21.7-610mm; T: 1.8-16mm Application: for oil pipe, casing, line pipe in petr...
ERW: D: 21.7-457.2mm; T: 1.8-14.27mm Spirally submerged arc welded pipe: D: 219-3040...