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ERW steel pipe, OD: 21.3 mm-610 mm LSAW steel pipe, OD: 219 mm-2150 mm Seamless steel pipe, OD: 10.3 mm-762 mm SSAW steel pipe, OD: 219 mm-3500 mm Square tube, 20*20 mm-600*600 mm Rectangular tube, 10*20 mm-600*400 mm