... welding machine 1,low price, energy saving. 2,mosfet design 3,Welding thickness:2.0-12.0 ZX7-400amp heavy duty welding machine ... best for outdoor movable working and high altitude working. 6.Beautiful shape of seam, good quality of arcing starting, stable arc and small ... Energy saving up to 50% .11.Replacing of welding machine ZX5&BX series. B.Main Specification Power SupplyAC 380V three phaeRated ...