最終更新日：2023/09/05
The Dutchman's log is a nautical instrument used to measure the speed of a ship.
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The Dutchman's log is a nautical instrument used to measure the speed of a ship.
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The Dutchman's log is a nautical instrument used to measure the speed of a ship.
The Dutchman's log is a nautical instrument used to measure the speed of a ship.
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