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Hot DIP Galvanized Square Steel Pipe Shs30X40X2.0mm Q235B Q355b ASTM A500 Gi Pipe for Construction, Find Details and Price about Steel Coil Hot-DIP Galvanized from Hot DIP Galvanized Square Steel Pipe Shs30X40X2.0mm Q235B Q355b ASTM A500 Gi Pipe for Construction - Linyi Rongxiang Steel Pipe Co., Ltd.