pitch line
noun
1
: the line on which the pitch of gear teeth or sprocket teeth is measured and which consists of an ideal line in a toothed gear or rack which bears such a relation to a corresponding line in another gear with which it works that the two lines will have a common velocity (as in rolling contact)
2
: the line from which players lag in the game of marbles
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“Pitch line.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pitch%20line. Accessed 28 Nov. 2024.
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