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- You can select single, dual or multi frequency among Germany (DCF, 77.5kHz), US (WWVB, 60kHz), Japan(JJY40 &NJJY60), or UK(MSF 60kHz) . 全球独创铜字面电波表。根据不同国家的频率，生产单频，双频，多频的机芯（DCF，JJY，NJJY，MSF，WWVB）。
- multi frequency energy harvesting 多频能量采集
- multi frequency signaling system 多频信令系统
- Dual Tone Multi Frequency(DTMF) signal DTMF信号
- When a vibrating source of waves is approaching an observer, the frequency observed is higher than the frequency emitted by is lower than that emitted. 当振动着的波源逐渐靠近观测者时，测量到的频率比从波源发出的频率高。
- In the process of GPS triple frequency observables, the rms of the integer ambiguity isn't fit for detecting and correcting cycle slips for the pseudo-range noise. 摘要在GPS三频非差观测数据的处理中，由于伪距噪声的影响，利用原始的伪距和载波相位观测数据估计的模糊度误差比较大，不能用于探测和改正周跳。
- Dual Tone Multi Frequency detection [DTMF detection] 双音调多频探测
- Dual Tone Multi Frequency generation [DTMF generation] 双音调多频放射
- multi frequency test system for automobile shock absorber 多频减振器试验台
- dual tone multi frequence (DTMF) 双音多频
- Parametric faults detecting with multi frequency test applied in ATE ATE环境下的多频测试参数故障检测
- He varied the transmission frequency. 他变换了无线电传送的频率。
- A unit of frequency equal to one cycle per second. 赫兹频率的单位，等于每秒一周
- Fatal accidents have decreased in frequency over recent years. 近年来死亡事故发生的频率已经下降。
- Turn the mode dial to select multi exposure mode. 把模式盘转到多重曝光模式。
- We can often correlate age with frequency of illness. 年龄的大小往往与发病率有关。
- Accidents on that highway are happening with increasing frequency. 那条高速公路上车祸发生得越来越频繁。
- The Multi Commodity Exchange of India Ltd. 印度大宗商品交易所。
- Multi Commodity Exchange of India Ltd. 和印度多种商品交易所。
- Multi Vision TM Confined Space Gas D. 密闭空间气体检测仪。
