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cofferdam/
'kɔfɚ.dæm
'kɔfə.dæm
/
1.noun
（河流、湖泊等的）围堰
2.noun
围堤,围堰为在河流或湖泊等中施工而临时建造的不透水构筑物
3.
围堰
4.noun [Navigation]
空隔舱
5.noun
(在船的吃水线以下进行修理时用的)潜水箱,沉箱