coffer-dam
A surname from Irish.
Alternative form of Cocytus
(zoology) Having a head.
(engineering) A type of watertight enclosure used to create a dry foundation for building bridges and other structures over water.
技術者たちは桟橋の周りに仮設の止水囲いを設けて水を排出し、コンクリートの基礎を打設した。
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