您要查找的是不是：
- In band voice frequency signalling device 带内音频振铃装置
- voice frequency signalling current 音频振铃电流
- voice frequency signalling system 话频信号系统
- voice frequency signaling system 话频信号系统
- voice frequency signaling relay set 音频信号中继器
- Specification for simple telex terminals using single channel voice frequency signalling for connection to British Telecommunications telex network 与英国用户电报通信网连接使用单通道音频的简易用户电报终端规范
- voice frequency signalling 音频信号方式
- VFT? Voice Frequency Transmission? 音频传输?
- VFT? Voice Frequency carrier telegraph Terminal? 音频载波电报终端?
- VFO? Voice Frequency Oscillator? 音频振荡器?
- voice frequency signal 音频信号
- voice frequency signaling set 音频信号设备
- The readout principle and test method of high frequency signal of CD are introduced. 介绍了CD光盘的高频(HF)信号的读取原理和测试方法。
- The match strobe gate is presented to improve the measurement precision of low frequency signal. 文中提出使用匹配选通门提高低频信号频率测量精度。
- You are also not allowed to communicate on any text or voice frequency in use by pilots and regular ATC. 同时，也不得在正式管制员与飞行员通讯的频率上进行文字和语音通讯。
- In researching computer voice input, analysis of voice frequency is a crucial step. 研究电脑语音输入，分析声音的频率特质是很重要的步骤。
- The output of common ultralow frequency signal generator has only a few fixed waveforms which can not be changed. 常用超低频信号发生器的输出只有几种固定的波形,不能更改。
- Spectrograms show Kosik's voice frequency when he makes human sounds is similar to his keeper's. 通过声谱图对比发现，科希克发出的声音频率与饲养员金中干的非常相似。
- High quality REC of video frequency signal and big area communion of video frequency resources are the important parts of Instruction Multimedia Resources. 其中,视频信号的高质量录制、视频资源的大范围共享,是多媒体教学资源建设的重要组成部分,成为教育界所关注的重点。
- The DFT phase detection method can take out frequency, phase and magnitude of the base frequency signal from a random synchronization signal. 离散傅里叶变换可以从任意信号中抽取基准频率倍频次信号的相位、频率和幅值,可以解决谐波对外同步信号的影响,从而实现周期控制锁相环对谐波的识别。
