“parfocal eyepieces”的概念、定义、翻译、参考文献-科学参考

单词	parfocal eyepieces
释义	parfocal eyepieces [pär`fō·kǝl `ī´pēs·ǝz] ^OPTICS Eyepieces whose lower focal points lie in the same plane, so that they can be interchanged without changing the focus of the instrument with which they are used.
随便看	FOR statement forsterite fort Forth fortification fortification agate Fortin barometer fortnightly nutation fortnightly tide FORTRAN Fortrat parabola fortuitous distortion Fortuna forty-four-type repeater Forty Saints' storm forward forward-acting regulator forward-backward counter forward bias forward coupler angaralite Angara Shield angel echo angelica angelica oil

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