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单词 pitch line
释义

WordReference Random House Unabridged Dictionary of American English © 2024
pitch line′, [Mach.]
  1. Mechanical EngineeringSee pitch circle. 
  2. 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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更新时间:2024/11/11 11:02:49