振幅频率比值曲线图
amplitude versus frequency plot
振幅周期比率
amplitude to period ratio
SH/P振幅比
SH and P wave amplitude ratio
程控频率振幅调变
programmed frequency amplitude modulation
PFAM
大振幅振动
oscillating in large amplitude
large amplitude vibration
大振幅振动测量
Large vibration measurement
脉动压力振幅比尺
amplitude scale of fluctuating pressure
扭振振幅
torsional vibration amplitude
频率振幅补偿
frequency amplitude compensate
频率振幅调制完毕
FAM Frequency and Amplitude Modulated