... Advanced inverter technology, high reliability, stability 2.Compact size, light weight 3.Applicable for various weld rods Introduction:ZX7 MMA inverter DC arc ... (high frequency) of 100KHz, thus reducing the size and weight of the main components (transformers).The application of PWM ( ... has more advantages, as it is smaller, lighter in weight, higher in power exchange rate etc.Features:l High quality ...