dc brand welding machine ZX7-250D 1.advanced(MOS)inverter technology 2. ... 3.widely used 4.energy saving dc brand welding machine ZX7-250D♥ Use: light manufacturing, maintenance, civil steel structure ... arc stability, weld pool easy to control, weld appearance, 200B with thrust adjustable function; ♥Improve the protection system: over ... protection to ensure welding safe...... new welder ZX7-250D