您要查找的是不是：
- standard frequency generator 标准频率发生器
- Measurement of environmental sensitivities of standard frequency generators 发电机频率对环境影响的测量标准
- 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；
- Purpose: Audio frequency general purpose ,driver stage amplifier applications. 用途:用于音频放大,激励级放大。
- In the process of maintaining and upgrading 8410 ICP direct reading spectrometer, maintaining and adjusting of -145 V switching power supply of ICP high frequency generator are often required. 摘要在维修和改造8410型电感耦合等离子体直读光谱仪过程中，经常需要对ICP高频发生器中的开关电源进行维修和调整。
- A kind of cost-effective and high performance inverter for portable immediate frequency generator was develoed combining the dual phase-shifted SPWM control strategy with digital SPWM modulator. 将二重移相SPWM控制策略与数字式SPWM调制器相结合,研制了一种适用于便携式中频发电机的低成本、高性能逆变器。
- Voltage and frequency generated by synchronous generator vary along with the wind variation, so the power must be dealt with before it is applied to grid. 同步直驱风力发电系统的定子电压和频率随风速的变化而变化,需要经过一系列控制电路的调整才能并网。
- 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。
- The heterodyning principle is well known in nonlinear optics as difference frequency generation (DFG). 在非线性光学领域,超外差原理就是著名的差频产生(DFG)技术。
- standard frequency and time signal service 标准频率和时间信号业务
- High Stability Synthesizer High Frequency Generator 高稳定度频率合成高频信号发生器
- Standard frequency and time signal 校准频率和时间信号
- bipolar high frequency generator 双极高频发生器
- Standard frequency and time signal station 标准频率和时间信号电台
- helical explosive magnetic frequency generator 螺旋型磁频率发生器
- Standard frequency and time signals 标频时信号
- It is proved that the multi-reflection of F-P cavity has little influence on the measurement of vibration with a frequency generally not higher than some dozen kilohertz. 发现透射响应比反射响应有微小延时,证明了F-P腔的多次反射原理对于一般频率不超过几十千赫兹的振动信号的测量没有影响。
- There is a standard form of oath used in lawcourts. 法庭中使用的誓词有固定的格式。
- This is one of the standard books on the subject. 这是有关这个问题的权威著作之一。
