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1. The surface ship gravity metre is used to measure the weight of a ship at sea.
表面船重力度量衡用于测量船舶在海上的重量。
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2. The surface ship gravity metre is an important tool for navigators to determine the weight of their ships.
表面船重力度量衡是航海家确定其船只重量的重要工具。
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3. The surface ship gravity metre is used to calculate the distance traveled by a ship during its journey.
表面船重力度量衡用于计算船舶航行过程中的行程距离。