TIG-250 dc interver welding machine: 1.Saving energy over 50% than BX Series 2.high effieciency 3.good quality TIG-250 dc interver welding machine1.Apply to variety specifications znd materials of the electrodes 2.Used for welded stainless steel,alloy steel,carbon steel,copper and other nonferrous metais 3.Main transformer weight,volume decreased drastically,and efficiency over 30%