便携式盒式调频调幅收录机
portable cassette type FM-AM recorder-receiver
单通道调频遥测仪
single-channel frequency modulation telemeter
调频调峰
frequency and peakload modulation
调频调幅
frequency and amplitude modulation
调频调幅变换器
frequency modulationamplitude modulation converter
调频调功
pulse frequency modulation
调频调宽
modulating frequency and width
Variable-frequency Variable-wide
调频调相
frequency phasic modulation
调频-调相
FM-PM Frequency Modulation – Phase Modulation
调频—调相
frequency modulation-phase modulation
调频调谐器
frequency modulation tuner
调频调谐试验
tuning frequency modulation
调频调压
frequency and voltage regulation
variable frequency and voltage regulating
调频调载
frequency and power adjustment
frequency and load control
automatic frequency load regulation
调频调栅振荡器
tuned-grid tuned-plate oscillator
Armstrong oscillator