Inverter Welder MachineInverter,High duty cycle, stable arc,energy saving,economical,INVERTER TECHNOLOGY,CEM A. Function and features1. Adopted advanced full-bridge inverter technology ... shape with high quality of welding bead4. Easy for arc starting, little spatter, excellent welding performance 5. Stable performance ... 3. Technical Support. 4. CCC certificate ST/WD-1621V Inverter Welder Machine