frequency lead频率导引frequencyn.频繁；频率frequency division multiplex terminal频分多路终端机frequency multiplier local oscillator倍频本机振荡器Frequency Distribution Analysis Sheet频率分配分析图表frequency modulated television signal调频电视信号frequency and temperature performance频温特性frequency-hop communication systems跳频通信系统frequency conversion and phase-lock变频锁相frequency generator frequency doubler频率发生器倍频器frequency conversion and lowing speed变频降速Frequency-domain optical delay line频域快速扫描延迟线