IGBT Inverter tech., with pulse welder, precision position, constant and concentrative arc, TIG WELDING DEVICE ... 540 x 600 Features of TIG WELDING DEVICE WSM315:1. IGBT inverter technology and precision constant current feedback control technology, soft ... -current protection, under-voltage protection,;4. Applicable for TIG and MMA welder;5. Suitable for metal sheets: stainless steel, carbon steel, ...