英语词汇“old achromat”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	old achromat
释义	old achromat old achromat [¦ōld ′a·krə‚mat] (optics) An achromatic lens in which the component lenses are made of glasses chosen from a limited selection, in which refractive index and dispersive power vary roughly together.
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