crown tree
noun
1A horizontal supporting member in a windmill.
2A horizontal beam resting on two uprights, supporting the roof in a in a mine.
Origin
Late Middle English; earliest use found in Contract.
| 单词 | crown tree |
| 释义 | crown treenoun 1A horizontal supporting member in a windmill. 2A horizontal beam resting on two uprights, supporting the roof in a in a mine. Origin |
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