tig/mma dc/ac inverter pulse welding machine TIG315AC/DC 1.welding style :DC/ TIG welding ... 85%, no-load loss is small;precise control system: PWM pulse width modulator,closed loop control system to ensure the machine ... : 1.digital display, clear and intuitive, precise regulation; 2.external remote automatic conversion function, convenient and practical, and more intelligent; 3 ...