英语词汇“laser pen”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	laser pen
释义	laser pen noun 1A small, slender hand-held device emitting a laser beam, used for scanning bar-codes. 2A hand-held device emitting a narrow beam of coloured light, typically used by speakers to project a visual pointer on to a screen. Origin 1980s; earliest use found in Industry Week.
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laser pen