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- ocean floor topographic survey 海底测量
- sea floor topographic survey 海底地形测量
- They differ somewhat from bathymetric charts which are virtually topographic maps of the ocean floor. 它们与水深图稍有不同，后者实际上是洋底地形图。
- The submarine bottomed to observe the ocean floor. 潜艇潜入海底观察洋底。
- The submarine bottomed on the ocean floor. 潜水艇停在洋底。
- The damaged ship leaned over and slowly settled down on the ocean floor. 这艘损坏的船倾斜起来，慢慢沉到大洋底。
- Sediment building up on the ocean floor. 海底积累的沉积物
- That the ocean floor is not flat is a known fact. 洋底不是平坦的是一个已知的事实。
- A long, steep-sided valley on the ocean floor. 海沟一种海底狭长而两边陡峭的山谷
- The submarine bottomed on the ocean floor . 潜水艇停在洋底。
- A large, bowl-shaped depression in the surface of the land or ocean floor. 凹地，海盆在陆地或海底平面的一种大的，碗状的凹地
- The operation process of GPS(RTK) electronic tachometer is introduced and its application in topographic survey is briefly illustrated. 本文介绍了GPS(RTK)配合全站仪的作业流程,简要阐明了其在地形测量中的应用。
- Recent ocean floor data confirm the first part of this slow process. 近来洋底资料证实了这一缓慢过程的第一部分。
- In the following 10 days, they completed the topographic survey of 400 silt sections with a total length of 4,500 km. The workload greatly surpassed the process of a flood. 在其后10天内他们还将完成400个淤积断面，4500公里长度的地形测量任务，其工作强度远远超过一次洪水过程。
- This includes mainly the technique of the sealoor topographic survey, the technique of the seafloor mophological survey and the technique of the sea subbottom profile survey etc. 它主要包括海底地形测绘技术、海底形貌观测技术、海底地层声学探测技术等。
- Through comparison between traditional survey and digital topographic survey, the specialties of digital topographic survey are analyzed in detail by basis of production practice. 以生产实践为基础，通过与传统测量的比较，详细分析了数字化地形测量的特点，提出了其优越性。
- The ocean floor near the continents is abundant in mineral and oil deposits. 靠近大陆的海底矿藏和石油藏量丰富。
- Echo sounding devices were early used in making maps of the ocean floor. 讲的是回声定位仪器最早用于绘制海底地图。很容易找到对应的答案。
- Underwater photography is also important in mapping parts of the ocean floor. 水下摄影在绘制部分海床图时也是很重要的一个方法。
- The damaged ship leaned over and slowly settled own on the ocean floor. 这艘遭毁坏了的船倾斜了，并缓慢地沉到海底。
