测量也是军用电力系统运行控制中的重要技术。
Frequency measurement also is important control technology in running military power system.
例如，装有复杂的控制装置的早期高速列车模型无法在暴风雪中运行，因为风扇会把雪吸进电力系统。
For example, early models of high-speed railroad cars loaded with sophisticated controls were unable to operate in a snowstorm because a fan sucked snow into the electrical system.
电压是电能质量的重要指标之一，电压稳定控制是驾驭电力系统安全稳定运行的重要工作之一。
Voltage is one important standard of power quality, steady voltage controlling is one important work of keeping safe and stable running of power system.
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