frequencyn.频繁;频率
frequency converter speed regulation变频调速
frequency calibrated recording paper频率校准记录纸
Frequency Resource Management System频率资源管理系统
Frequency Hopping Spread Spectrum LT不透水型电机
frequency divider with no limitation任意分频器
frequency scintillation oscilloscope频显示波器
Frequency-varying adjust technique变频调速系统
frequency characteristic measurement频率特性测量