seam welding machine 1. good performance 2, automatic welding seam welding machine→ Mainly used in stainless steel, iron, ... other metal cylinder, puzzle straight seam welding.→ This machine adopts automatic running gear, weld well, beautiful.→ The largest workpiece length (mm ... thickness: 0.3-8.0mm→ Welding speed: 30-800mm/min automatic dicrect seam welding machine