... , aluminum, brass and other metal cylinder, puzzle straight seam welding.→ This machine adopts automatic running gear, weld well, beautiful.→ The largest workpiece ... length (mm): 300, 500, 1000, 15000, 2000→ Welding thickness: 0.3-8.0mm→ Welding speed: 30-800mm/min automatic dicrect seam welding machine