GI hot dipped square hollow section steel pipe factory supplier hollow section hot dip
Hot dipped galvanized hollow section tubes China Tianjin . ERW steel pipe; Hollow section square tube; Scaffolding Steel Pipe; Hot Dipped Galvanized Square Steel Tubes StandardASTM A500, BS EN10219,EN10210 GB/T3094,GB6728,JIS G3466 2010 Material:Q195,Q235,Q345,GRA GRB,S235JRH,S275JOH,S355JOH,STKR400,SS400 ETC, Outdiameter:10*10mm 600*600mm Wall
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