您要查找的是不是：
- VFO? Variable Frequency Oscillator? 可变频率振荡器，变频振荡器?
- VFO? Voice Frequency Oscillator? 音频振荡器?
- standard frequency deviation oscillator 标准频偏振荡器
- The compressor of frequency conversion air conditioning is not to work all the time it is under standard frequency, can be accelerated according to need or decelerate speed. 变频空调的压缩机不是一直工作在标准频率之下，可以根据需要加快或者减慢速度。
- Firstly, the responses of some classified speakers were acquired and processed in order to get the standard frequency spectrum of different types of loudspeakers. 首先，对87个类型已知的各类扬声器进行数据采集和数据处理，并计算不同类型扬声器的类标准频谱图；
- intermediate frequency oscillator 中频振荡器
- twice horizontal frequency oscillator 双行频振荡器
- Quartz-Crystal Frequency Oscillator 石英晶体频率振荡器
- quartz crystal frequency oscillator 石英晶体频率振荡器
- Use standard frequencies like Daily, weekly, monthly or set up your own custom frequencies eg 4-4-3, every other day, third Monday of the month. 使用标准的频率一样，每天，每周，每月，或成立自己的自定义频率，例如4-4-3 ，每隔一天，第三周一至本月底。
- In audio, a very low frequency oscillation often resulting from a positive feedback path in an amplifier system. 在音响设备中出现的振荡频率极低的低频振荡，常因放大系统的正反馈回路引起。
- Universal Radio Frequency Oscillator 通用无线电频率振荡器
- twice-horizontal frequency oscillator 水平双频振荡器
- standard frequency and time signal service 标准频率和时间信号业务
- dielectric dot frequency oscillator 介质点频振荡器
- Standard frequency and time signal 校准频率和时间信号
- A combined power system adaptive stabilized apparatus GPSS is designed to suppress low frequency oscillation and to improve power system stability. 为了抑制电力系统因负阻尼而产生的低频振荡;提高电力系统稳定性;设计了一种组合电力系统自适应稳定器GPSS(以下简称自适应稳定器GPSS).
- The influence of inertia constant (H_D) of induction motor on low frequency oscillation (LFO) was studied. 研究感应电动机惯性时间常数HD对电力系统低频振荡(LFO)的影响.
- Standard frequency and time signal station 标准频率和时间信号电台
- One is the low bus voltage at Omei substation;and the other is the low frequency oscillation problem. 目前台电系统中存在两个主要问题：一个是峨眉汇流排电压过低的问题，另一个是潜藏在区域间的低频振荡问题。
