短語(yǔ)詞組短語(yǔ)echo -sounding device 回聲側(cè)深儀Echo -Sounding Room 回聲測(cè)深儀室Marine echo -sounding equipment 船用回聲測(cè)深設(shè)備ultrasonic echo -sounding device 超聲 返回 echo-sounding