echo depth recorder ==> 回声深度记录器 echo depth sounder ==> 回声测深仪,回音测深仪 echo depth sounding sonar ==> 回声测深声纳,回声测深仪,超波深度测定器,超声波深度测定器 ..
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... Test for depth sounder 测深仪试验 echo depth sounder 回声测深仪 ; 回音测深仪 marine depth sounder 海洋回声测深仪 ...
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double-channel echo well depth sounder 双通道回声井深测试仪
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.
回声测深仪是用来测量水深的一种声学测量设备，其以水中超声波的传播速度为确定条件，利用发射波与反射回波时间差来测量水深。
When passing One Fathom Bank, check the depth and variable sand waves below the sea level all the time by echo sounder.
通过一托浅滩时，要一直测深校时水深及海面下多变的沙纹。
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