FF：固定频率
“固定频率”（Fixed Frequency）在学术和科研领域，尤其在业余无线电通信中，常被简写为“FF”。这种缩写方式不仅便于快速书写和使用，还能有效提高专业文档和交流的效率，是行业内广泛采用的标准化表达。
Fixed Frequency的英文发音
例句
- A precise PFC / THD instrument for control of high performance partial switching power factor correction circuits operating at a fixed frequency is presented.
- 介绍了一种高性能的功率因数校正装置&部分开关式功率因数校正电路，并提供了详细的设计方案。
- Through adding varactors, a new structure is introduced and it realizes controllable wave-beam of fixed frequency which is better for practical use.
- 文章提出一种新型结构，通过加入变容二极管，实现了在固定频点上波束可控，更适于实际应用。
- The function of the inner circuit is for activating the transducer to produce the fixed frequency, and providing the high voltage and the signal of vibration for transducer.
- 机体内部的电路主要是为了激发压电陶瓷产生额定频率，而提供压电陶瓷要求的高电压及振荡信号。
- Real-time timing or fixed times downtime, boot maintain current status, The whole timing or fixed frequency tracking open action if they are qualified, Print the test report.
- 实时定时或定次数停机，开机保持当前状态；全程定时或定次数跟踪开启动作是否合格；打印检测报告。
- This platform can simulate the ray tracing for a fixed frequency or sweeping frequencies, also can calculate the group path and the covered region of rays.
- 当平台否实现订频或许扫频射线轨迹演示，盘算各射线群道径，覆揭区域等功能。
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