英语词汇“pitch line”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	pitch line
释义	WordReference Random House Unabridged Dictionary of American English © 2024 pitch′ line′, [Mach.] Mechanical EngineeringSee pitch circle. Mechanical Engineeringan imaginary line within the profiles of the teeth of a rack, such that it moves against, and at the same rate as, the pitch circle of an engaging pinion. 1790–1800
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