低频频谱分析仪
LF frequency spectrum analyzer
地震输入频谱特性
frequency of earthquake input
高分辨率低频频谱分析仪
high resolution LF frequency spectrum analyzer
高频频谱分析仪
HF frequency-spectrum analyser
射频频谱学
radio-frequency spectroscopy
声频频谱记录仪
sonic frequency spectrum recording meter
声频频谱仪
audio-frequency spectrometer
双通道数字式低频频谱分析仪
double-channel digital low-frequency spectrum analyzer
遥测视频频谱
TVS Telemetry Video Spectrum