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China Black Paint Structural Pipes as Per As1074 Fire Steel Pipe Square Tube As1163 Tianjin Ruitong Iron and Steel Galvanized Pipe, Find Details and Price about Steel Tube Pipe from China Black Paint Structural Pipes as Per As1074 Fire Steel Pipe Square Tube As1163 Tianjin Ruitong Iron and Steel Galvanized Pipe - Tianjin RuiTong Iron & Steel Co., LTD.