Inverter AC&DC square wave tig welding machine 1.Welding thickness:0.5-10mm ... :6.3 3.No-load voltage:54V Inverter AC&DC square wave tig welding machine TIG250ACDCFunction and feature: Small size, light ... ,sable welding current,fast dynamic response,noisyless,little spatter,no magnetic biasing,good welding surface Suitable for various welding rod, be ...