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2. the ability to network compensation, the supply voltage, current wave soldering, stable and reliable. 3. and unloaded and small, traditional welding machine than 80%. 4. but to save power, disobedient 100khz high rate of, dynamic, in response to an electric arc stability and the arc, low noise, fusing the deep, high strength. 5 and good thrust and a sticky, apply to all kinds of steel.