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单词
parallel rulers
释义
WordReference Random House Unabridged Dictionary of American English © 2024
par
′
allel rul
′
ers,
a pair of straightedges connected by two pivoted crosspieces of equal length so as to be parallel at all times, used for various navigational purposes, esp. for transferring the bearing of a plotted course to a compass rose.
1695–1705
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更新时间:2026/2/25 17:55:31