ballast keel
noun
A weight attached to or incorporated into the keel of a vessel to serve as ballast; especially a heavy metal moulding attached to the keel of a sailing vessel.
Origin
Early 19th century.
| 单词 | ballast keel |
| 释义 | ballast keelnoun A weight attached to or incorporated into the keel of a vessel to serve as ballast; especially a heavy metal moulding attached to the keel of a sailing vessel. Origin |
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