... cycle dc inverter arc argon welding machine TIG/MMA-200:1.Use: widely used instruments, decoration, hardware, small parts, maintenance, etc.; 2 ... control system to ensure the machine is stable; 5.Excellent welding performance:(1), gas adjustable delay 0-10S, save gas and ... , overvoltage, overheating, over current, overload, phase auto-protection to ensure welding safety, reliability and durability;