/ kɔːfərdæm /
Množina reči cofferdam je cofferdams.
caisson · pneumatic caisson
Narrow vacant space between two bulkheads of a ship. coffer-dam
1. A watertight enclosure from which water is pumped to expose the bottom of a body of water and permit construction (as of a pier)
2. A watertight structure for making repairs below the waterline of a ship