frequency lead频率导引
frequencyn.频繁;频率
frequency -response characteristic频率响应特性
frequency-converter resonance test变频谐振试验
frequency modulation radio altimeter调频无线电测高计
frequency -domain batch processing频域批处理
frequency-modulated broadcast band调频广播波段
Frequency-shifting Automatic Block移频自动闭塞
frequency shift communication system移频通信系统
frequency-varied regulation device变频调速装置