~(87)Rb atomic frequency standard
10 kV frequency converter
4-level frequency modulation (4-level FM)
50hz Frequency Interference
50Hz power frequency interference
95% spetral edge frequency
A C frequency modulator speed govornor
A Frequency Distribution Table
a high frequency and efficiency regeneration syste
A Method Progressive Colcking Frequency
a time-varying frequency selective MIMO channel
abatement to mirror frequency suppression
abnormal frequency pulse
absolute frequency band gap
absolute frequency measurement
absolute frequency meter