短語詞組短語acoustic c frequency generator 聲頻發(fā)生器acoustic c frequency sounding 聲波頻率測深acoustic natural frequency 聲學固有頻率acoustic resonance frequency 聲共振頻率Acoustic Oscillation Frequency 聲學共振頻率acoustic c frequency 聲頻;音頻acoustic eigen frequency 聲學固有頻率acoustic absorbing frequency band 吸聲頻帶acoustic c frequency measuring instrument 聲頻測量儀器 返回 acoustic frequency