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1. The depth manometer is used to measure the depth of water in a well.
深度计用于测量井中水的深度。
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2. The depth manometer was used to detect the presence of gases in the underground caves.
深度计被用来检测地下洞穴中的气体存在。
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3. The depth manometer was used to measure the pressure difference between two points on the earth's surface.
深度计被用来测量地球表面两点之间的压力差。