165×165mm square steel pipe&tube mill line, HR,CR,GI, Black Steel.

This video can teach you how to make “Carbon steel pipe/tube, galvanized steel pipe/tube, black steel pipe/tube, HR,CR ”，the name of this machine is “ERW tube mill/HF Welding Pipe Production Line/Straight Seam Pipe Welding Machine, Steel Tube Mill, Steel Pipe Forming Machine “. Involving round tubes, square tubes, rectangular tubes, LTZ tubes, special-shaped tubes If you want more information, here is my contact information. Hope you like it and thank you for watching. WhatsApp/wechat 1832162412 stevenma@