单词	x 射线比重计
释义	同X 射线密度计--X 射线比重计--X 射线浓度计
随便看	frequency test frequency theory frequency theory of probability frequency thermometer frequency threshold frequency--threshold frequency-time analysis frequency-time analysis method frequency-time analysis method (ftan method) frequency time clock frequency time coding of pulse frequency time control frequency time control，ftc frequency time curve frequency time curve {=ftc} frequency-time-intensity frequency time modulation frequency time modulation，ftm frequency-time response frequency-time spectral density function frequency time standard frequency time standard{=fts} frequency tolerance frequency-to-number converter frequency, total