“error of perpendicularity”的概念、定义、翻译、参考文献-科学参考

单词	error of perpendicularity
释义	error of perpendicularity [`er·ǝr ǝv ´pǝr·pǝn´dik·yǝ`lar·ǝd·ē] ^NAVIGATION That error in the reading of a marine sextant due to nonperpendicularity of the index mirror to the frame.
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