单词	pitch line
释义	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 Word History Etymology pitch entry 4
随便看	Callianassa callianassid Calliandra calliandrae calliandras callibogus Callicarpa callicebi Callicebus callicebuses callicebusses Callichthyidae callidity Callier quotient calligram calligraph calligrapha calligraphed calligrapher calligraphers calligraphic calligraphically calligraphies calligraphist calligraphists

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