... 5.ISO9001,UKAS,CCC,CE WSEM series of digital controlled IGBT inverter (square wave) DC/AC pulse TIG welding machineFeatures:1.Advanced ... , and enhancing production efficiency. 6.With excellent weld shape, this series are the ideal type for aluminum welding. 7.Using foot ... (A) 10-25020-31530-500 Duty cycle(%) 60%60%60%Pulse peak time(s) 0.1 - 15Pulse background time(s) 0 ...