frequency zone频率带
frequencyn.频繁;频率
frequency measurement error测频误差
frequency marker oscillator频率标志振荡器
frequency sensitive starter频敏起动器
frequency of flood disaster洪灾频率
frequency translation stage变频级
frequency-modulated sound调频声,频调声
frequency-changing method变频法
frequency spectrum analysis频谱分析
frequency-domain receiver频域接收机
frequency converter control变频控制