... welding machine TIG315AC/DC 1.welding style :DC/ TIG welding 2.4T control,ease of long-weld opera dc/ac inverter square ... continuously adjustable,bright and beautiful welds;perfect the protection system: 1.under voltage, over voltage,over current, over heating, ... , welding, it has excellent stabilty;perfect user-friendly design: 1.digital display, clear and intuitive, precise regulation; 2.external ...