echo depth sounder
常见例句
- When passing One Fathom Bank, check the depth and variable sand waves below the sea level all the time by echo sounder.
通過一托淺灘時，要一直測深校時水深及海麪下多變的沙紋。
blog.sina.com.cn - Echo Sounder is a kind of acoustic measuring depth equipment, which can measure depth with the time between transmitted wave and echo on condition in which the speed of ultrasonic is fixed.
廻聲測深儀是用來測量水深的一種聲學測量設備，其以水中超聲波的傳播速度爲確定條件，利用發射波與反射廻波時間差來測量水深。 返回 echo depth sounder