英语词汇“optical comparator”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 comparator
释义	optical comparator noun Any of various instruments for facilitating the visual comparison of two objects or images; especially one that projects shadows or transparencies of them on to a screen. Origin Early 20th century; earliest use found in Science.
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optical comparator