英语词汇“principal normal”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	principal normal
释义	principal normal principal normal [′prin·sə·pəl ′nȯr·məl] (mathematics) The line perpendicular to a space curve at some point which also lies in the osculating plane at that point.
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