2. Excellent Welding/Cutting Performance & High Efficiency
　　When welding with the oxyhydrogen gas, the molten space is clean, the heat-affected area is small and the welding quality is the same or higher than oxyacetylene. When cutting, the penetration is deep, the heat-affected area is small and the cutting surface is smooth, compared with oxyacetylene. For ferrous metal, the cutting thickness can be up to 150mm (single machine applied) or 300mm (several machines applied together)by the HGQU-2000/315, and up to 350mm by QYF-6000(single machine and single fire applied). The speed of the oxyhydrogen cutting and the oxyacetylene cutting is almost the same. When applying arc inverter welding, the welding efficiency is more than 85%. The inverter arc welding achieves fine dynamic performance, little welding splatter, strong voltage compensation, stable welding arc, convenient arc control, wide operation range and steady low welding current. It is capable to meet special requirements of thin board welding, and its welding quality and efficiency is higher than the traditional silicon rectifying or the direct current arc welding.