像: likeness; portrait; picture频率: frequency; rate信号: signal; semaphore; gun多频率信号: multifrequency signal高频率信号: radio-frequency signal频率信号: frequency signal标准频率信号: standard frequency signal地速频率信号: speed-frequency signal稳定频率信号: stable frequency signal像信号频率,镜像频率: image frequencies单频率信号发生器: single-frequency signal generator交错频率信号图: frequency-interleaved pattern频率信号发生器: frequency of signal generator抑制邻近频率信号: reject signals at nearby frequencies最大图形信号频率,最高图像频率: maximum picture frequency镜像频率: frequency, image; image frequency; second-channel frequency图像频率: image frequency; imagefrequency; picture frequency最大像频率: maximum picture frquency多频率信令: multifrequency signaling频率信息: frequency information; frequency intelligence比率信号: rate signal电导率信号: conductivity signal发光率信号: luminance signal功率信号: power signal上升率信号: rate-of-climb signal
