frequencyn.频繁;频率
Frequency Modulation Frequency Modulation调频-调频
frequency shift voice frequency telegraph移频音频电报
Frequency stabilized carbon dioxide laser稳频二氧化碳激光器
frequency conversion / power frequency变频/工频
Frequency of high-water and low-water丰枯频率
frequency conversion speed adjusting pump变频调速水泵
Frequency Differential Phase Shift Keying频率差分移相键控
frequency conversion and speed regulation变频调速