... consistend quality,nice appearance 3.welding several materials 4.OEM is avaliable Hot sell TIG-250 Inverter IGBT Inverter Tig Welding machine. Features ... Functions4. Wide range of welding voltage, strong adaptability as to the power supply with high duty cycle, especially adaptable ... , alloy steel, cast iron, which has good welding shape.7. High duty cycle, suitable for continuous work of factory and ...