... control,constant voltag NB(MIG) IGBT CO2 shielded welding machine series NB-280/NB-350/NB-600TraitIGBT inverter ... range(±15%)Controlled by electronic reactor,stable welding performance,little splash,deep penetration,good welding bead.Slow wire ... light weight.easy operation,economical and practical,Stable welding can be realized at the current of 30A ... 584 NB(MIG) IGBT CO2 shielded welding machine series