名词
中文翻译：海磁测地仪
同义词：
['sea geodetic magnetometer', 'sea magnetic surveyor']
例句：
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1. The sea magnetic gradiometer was used to measure the depth of the ocean.
海磁测地仪被用来测量海洋的深度。
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2. The sea magnetic gradiometer was used to map the coastline of the country.
海磁测地仪被用来绘制国家的海岸线。
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3.The sea magnetic gradiometer was used to detect the magnetic field of the Earth's core.
海磁测地仪被用来探测地球内核的磁场。