英语词汇“parallel rulers”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

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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