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.
辞典例句
In bathymetric survey, the recorded seabed is distorted due to the beam - width of the echo sounder.
摘要在海底地形测量中, 由于波束角效应导致探测的海底地形存在失真.
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