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It pointed out that motor torque may be increased by double electric capacity phase-shift circuit.
指出，采用双电容移相线路可增大电机力矩。
Rc phase-shift circuit current mainly by the capacitor voltage is 90 degrees ahead of this feature.
移相电路主要是由电容器的电流超前电压90度这一特性。
Line equalizer control method, and integrating circuit, frequency shift circuit and transmission device.
线路均衡器控制方法，积分电路，频移电路和传输装置。
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