frequency spectra
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相关词汇
frequency lock
frequency
frequency domain input-output system theory
Frequency Modulation Multiplex Data Broadcast
frequency-multiplier and phase demodulation
Frequency-quadrupled antireflection coating
frequency control of electric-machine speed
Frequency Infidelity of Bi-Linear Transform
frequency-differential phase-shift keying
frequency division multiplex telegraph system
frequency modulation telecommunication system
Frequency Inverter and Environment Protection
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