... arc welder TIG-400P can invert the working frequency DC of 50Hz into the high frequency of 25KHZ, ... and suitable for welding. Its functions include DC MMA, DC TIG welding and pulsed TIG welding. It can ... is stable and operation is easy with application of HF technique.Protection is perfect: with over-current and ... , decoration industry, and power industries etc. Inverter DC Pulsed Gas Tungsten Arc Welder