A type of electronic modulation in which the phase of a carrier wave is varied in order to transmit the information contained in the signal.
相位调制，调相：一种电子调幅，为了传递包含在信号中的信息，而使载波的相位改变。
Pulse Width Modulation electronic speed control for highest efficiency.
脉宽调制效率最高的电子速度控制。
Controller: Pulse Width Modulation electronic speed control for highest efficiency.
控制器：最高效率脉宽调制电子调速器。
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