crown sheet
now historical
noun
1A sheet of crown paper.
2 Engineering a metal plate forming the upper part of the firebox of a steam engine.
Origin
Mid 18th century.
| 单词 | crown sheet |
| 释义 | crown sheetnow historical noun 1A sheet of crown paper. 2 Engineering a metal plate forming the upper part of the firebox of a steam engine. Origin |
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