depth finder

1. Based on the principle of mass balance, the Pseudo-Level Depth Finder can attain the true level by testing annular gas rate.
   根据物质平衡方法设计的拟液面测试仪，可通过测试油井环空排气量来确定油井的真实液面。
2. The depth finder is distinguished by the introduction of a special data processing technique.
   仪器的最大特点是采取了特殊的信息处理方法。
3. A description of a microprocessor-controlled ultra-sonic depth finder is presented.
   本文主要介绍了一种用微处理机控制的超声波测深仪。
4. A Microprocessor-controlled Depth Sounding System& Model CJ-83 Ultra-sonic Depth Finder
   一种用微处理机控制的超声波测深仪&CJ83型超声波测深仪
5. Manufacture and application of anti-slipping depth finder
   弹片挂钩防滑骨孔测深器的研制与应用
6. The principle of building-up field depth finder by fixed field source
   固定场源建场测深仪原理

noun

1. navigational instrument used to measure the depth of a body of water (as by ultrasound or radar)