... inverter pulse welding machine TIG315AC/DC 1.welding style :DC/ TIG welding 2.4T control,ease of long-weld opera dc/ac inverter square wave spot welding ... to ensure the machine is stable;excellent welding performance: 1. quality square wave power supply,current zero-crossing time is short,stable ... operations, reduce labor intensity welder....... tig/mma dc/ac inverter pulse welding machine TIG315AC/DC