英语词汇“optical flint”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	optical flint
释义	Collins Concise English Dictionary © HarperCollins Publishers:: optical flint n an optical glass of high dispersion and high refractive index containing lead oxide. They are used in the manufacture of lenses, artificial gems, and cut glass
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