短語(yǔ)詞組短語(yǔ)echo -ranging 回波聲程;測(cè)距submarine echo -ranging apparatus 潛艇水聲探測(cè)器combined echo -ranging echo-sounding 回聲測(cè)距與測(cè)深echo ranging apparatus 回聲測(cè)距儀 返回 echoranging