英语词汇“robertson screw”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	robertson screw
释义	Collins Concise English Dictionary © HarperCollins Publishers:: Robertson screw /ˈrɒbəts^ən/ n trademark a screw having a square hole in the head into which a screwdriver with a square point (Robertson screwdriver (trademark)) fits Etymology: 20th Century: after its inventor P. L. Robertson (1896–1951), a Canadian industrialist
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