... , MIG, air plasma, STUD and submerged welding machines DC Inverter MMA Welding Machi Technical Characteristics:1. Waterproof, anti-static, anti- ... arc-starting and arc force, anti-sticking.4. High welding quality, deep penetration, high intensity.5. Auto protection of ... .6-3.2Machine case materialSteelSteelPlastic or Steel DC Inverter MMA Welding Machine (welding machine, inverter mma welding machine)