... The open book, → cleaning equipment, → feed direction, → forming, → welding, → weld the entire inner peace, → oter weld grinding, → shaping sizing ... main components:1.open book machine (uncoiler), 2.forming welding machine,3.grinding machine, 4.sizing machine, 5. ... frame, cutting machine, finished frameCertification:Comany ProfileThe MachineThe Welding Table Automatic Industrial ss pipe wedling machine