... steel, AI, Cu etc.Adopting nano-meter micro-crystal material with high magnet conductivity and low power loss, the machine achieves ... of ZVS improves the efficiency and reliability.Compactness and lightness, with a weight 1/5 of SCR rectifier.LED meter can ... surfacing and spaces where the torch difficult to attain.Adopt printed motor with high torque, low inertia, stable speed and long life ...