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Sch80 Ss400 S235jr Q345 Q195 Sch 40 St37 St52 Hot Rolled Seamless Pipe Round Black Painted Carbon Seamless Steel Pipe Carbon Steel Tube, Find Details and Price about Carbon Steel Tube Steel Tube from Sch80 Ss400 S235jr Q345 Q195 Sch 40 St37 St52 Hot Rolled Seamless Pipe Round Black Painted Carbon Seamless Steel Pipe Carbon Steel Tube - TIANJIN BOER KING STEEL CO., LIMITED