frequency lead频率导引
frequencyn.频繁;频率
frequency-division multiplex access频分多址
frequency modulation signal generator调频信号发生器
Frequency - hopping Spread Spectrum跳频
Frequency converter with high voltage高压变频装置
frequency-selective level indicator选频式电平表
Frequency conversion speed adjustment变频调速
Frequency response curve of regulator调节器频率特性曲线
frequency electric and magnetic field工频电磁场