双: two; twin; both; dual源: source; fountainhead频率: frequency; rate键控: keying; manipulation二源频率键控: two-source frequency keying频率键控: frequency keying频率键控法: frequency keying method频率键控器: frequency shift keyer; frequency-shift keyer多进制频率键控: mfsk多进制数字频率键控: mfsk电源频率: aom frrquency; mai frequency; mains frequency; power frequency; power supply frequency; supply frequency电源频率偏差: power frequency deviation二源频率按键: two-source frequency keying市电频率；电源频率: mai frequency; mains frequency电源频率指示器: mai frequency indicator; mains frequency indicator双源: double sources; doublesource键控频率: keying frequency电源频率与电压试验: line frequency and voltage test电子电源频率调节装置: electronic power frequency control system帧扫与电源频率同步: mains hold频率变换键控: keying frequency shift; keying, frequency shift (fsk)最大键控频率: maximum keying frequency最高键控频率: maximum keying frequecy; maximum keying frequency频率微分相移键控: frequency differential phase shift keying双源法: double source method
