本发明电路结构简单，输出的交流电的波形为纯正弦波，输出的电压和频率稳定，不会随输入电压和负载的变化而变化。
The circuit of the invention is simple, the wave output is pure sine wave, voltage and frequency output is stable, they do not change with input voltage and load.
影响PS版砂目结构的因素有交流电的电流密度、电压、波形、 频率、电解液成分及其浓度和温度等。
The factors influencing the roughness of aluminium surface are current density, voltage, waveform, frequency, the component and concentration of the electrolyte and it's temperature.
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