英语词汇“harmonic pencil”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	harmonic pencil
释义	harmonic pencil harmonic pencil [här¦män·ik ′pen·səl] (mathematics) The configuration of four lines, passing through a single point, such that any line that is not parallel to one of the four cuts the four lines at points which are harmonic conjugates.
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