... CE certificate 3.high duty cycle New DC inverter arc welding machines-MMA-200 1. Advanced IGBT inverter technology, stable performance, inverter ... Modulator, closed loop control system to ensure the machine is stable4.Excellent welding performance: little spatter, arc stability, weld pool ... request of CE, 3C, ROHS, stable to use; each machine paseed the test like shaking, old age, high low voltage ...