... control,constant voltag NB(MIG) IGBT CO2 shielded welding machine series NB-280/NB-350/NB-600TraitIGBT inverter technology,current ... during arc starting,remove the tip ball after welding,easy arc-starting.Suitable for steel board with ... .light weight.easy operation,economical and practical,Stable welding can be realized at the current of 30A ... *322*584 NB(MIG) IGBT CO2 shielded welding machine series