DC ARC welder 1. Use moving coil type structure, the main circuit uses the bridge type rectification and reactance filter form.2. The output has AC and DC two kinds of voltages, not only may use 2-8mm acidic welding rod, low-carton steel, low-alloy steel and so on material, but also may use the alkalinity welding rod to weld carton steel, alloy steel, as well as cast iron welding and so on metal, ...