IGBT inverter technology,current-mode control,reliable quality,stable performance. Closed loop feedback control,constant voltag NB(MIG) IGBT CO2 ... 350/NB-600TraitIGBT inverter technology,current-mode control,reliable quality,stable performance.Closed loop feedback control,constant voltage output,fit ... practical,Stable welding can be realized at the current of 30A when using welding wire a adiameter ...