Device, in order to opposite mechanical or electrical effects trigger, if the frequency of an alternating current via - or falls below a normal frequency

• 1. 计及频率耦合效应的直驱式风机次同步振荡电气量分析方法 [P] . 中国专利： CN110676874A . 2020-01-10
• 2. 交流电气化铁道牵引网阻抗频率特性测试装置 [P] . 中国专利： CN104090182B . 2017.06.13
• 3. Device, in order to opposite mechanical or electrical effects trigger if the frequency of an alternating current via - or falls below a normal frequency [P] . 德国专利： DE428643C . 1926-05-14

  机译： 设备，以产生相反的机械或电气效果，如果交流电的频率通过-或低于正常频率，则触发

• 4. Device, in order to opposite mechanical or electrical effects trigger, if the frequency of an alternating current via - or falls below a normal frequency [P] . 德国专利： DE413622C . 1925-05-12

  机译： 如果通过-或低于正常频率的交流频率触发相反的机械或电气效应的设备

• 5. Device in order to remove mechanical or electrical effects trigger, if the frequency of an alternating current via - or falls below a normal frequency [P] . 德国专利： DE490588C . 1931-02-11

  机译： 为了消除机械或电气效应的装置，如果交流电的频率通过-或低于正常频率

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• 5. Effect of Burst Frequency and Duration of Kilohertz-Frequency Alternating Currents and of Low-Frequency Pulsed Currents on Strength of Contraction, Muscle Fatigue, and Perceived Discomfort [O] . Yocheved Laufer, Michal Elboim 2008
• 6. Frequency-Independent and Frequency-Dependent Polymer Transitions on FlexuralPlate Wave Devices and their Effects on Vapor Sensor Response Mechanisms [R] . Grate, J. W., Wenzel, S. W., White, R. M. 1991

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• 2. Comparison of Two Electronic Root Canal Length Measurement Devices: The Differences between Ratio Two Impedance Frequencies and Multi Frequencies [J] . Endang Suprastiwi ,Ratna Meidyawati . 口腔学期刊（英文） . 2014,第5期
• 3. Cropping frequency and N fertilizer effects on soil water distribution from spring to fall in the semiarid Canadian prairies [J] . R. de Jong ,C. A. Campbell ,R. P. Zentner . 农业科学（英文） . 2011,第3期
• 4. Comparison of the Frequency-dependent Effects of Amiodarone on Ventricular Electrophysiology in Congestive Heart Failure Canine Models and Normal Dogs [J] . Zhou Shuxian Zhang Yuling Lei Juan Wu Wei Zhang Xuming . 岭南心血管病杂志：英文版 . 2007,第2期
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