The phenomenon of beats can be observed directly on the double-channel oscillograph and the frequency of alternating current can be measured by the vibration curve of the beats.
在双通道示波器上可直观地观测拍现象，并利用拍振动曲线测量交流电的频率。
The control effect of electromagnetic force on cylinder wake, lift force and drag force , which was caused by alternating current, is related to its frequency.
而交流电所产生的电磁力对于绕流涡街、升力、阻力的控制作用，则与所使用的频率有关。
The system may measure many circuits high - frequency alternating current , direct current , frequency, efficiency of inverter .
系统测试项目有多路高频交流电流，直流电流，频率，逆变器的效率等。
The paper introduces the application, main alteration plan and the setting of relational parameters of technique of alternating current frequency conversion in Longmen planer′s electrical alteration.
介绍交流变频调速技术在龙门刨床电气改造中的应用和总体改造方案及有关参数的设置。
Through electrostatics and examples of low-frequency alternating current and direct-current circuit, the problem of zero potential point is queried and clarified.
通过静电学、低频交流、直流等电路实例，质疑了电势零点问题，并对此进行了澄清。
The frequency control of motor speed is used for alternating current motor of main winch on No1 BF charging system, so that it is possible to carry out control of skip moving speed.
安钢1号高炉主卷扬交流电机采用变频调速技术，实现料车运行调速控制。变频器运行一年多来，未发生过一次故障。
Electronic descaler is one that creates a rapidly alternating current in a frequency range that exceeds the best estimate of the internal natural frequency of water.
电子除垢器是一个创建一个迅速交流电的频率范围内，这超过了最乐观的估计内部自然频率的水。
Electronic descaler is one that creates a rapidly alternating current in a frequency range that exceeds the best estimate of the internal natural frequency of water.
电子除垢器是一个创建一个迅速交流电的频率范围内，这超过了最乐观的估计内部自然频率的水。
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