MCT-400Pro Full Digital Multi-process Welder MCT-400i Full Digital Multi-process Welder SA-500 Series Digital Multi-process Welders DPS series Full Digital Pulsed MIG/MAG Welder MPS -500 Multi-process IGBT Inverter Welder D7-500(N) Multi-process IGBT Inverter Welder Inverter welding machine ZX7-400S-X Inverter welding machine PCW-300