... TIG welding machine, can use DC to weld steel, also can use AC to weld aluminum, with remote current control. Inverter AC/DC TIG Welding Machine ... (WSE-315)Main Features :1.Minimizing,lightness, low noise ... and over-current. 3.Stable arc,beautiful welding surface and easy operation.4.Current can ... AC/DC Square Wave TIG welding machine(WSE-315)