| 单词 | ballast tank |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔seacock〕A valve in the hull of a boat or ship that may be opened to let in water so as to flood a ballast tank, for example.船底阀：小船或轮船壳体上的阀，水通过此阀门可进入船中，如放满压舱槽美国传统 |
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