Micrometer

(noun.) caliper for measuring small distances.

卡斯特罗校对

• The micrometer was a further advance in exact measurement. 李贝. 西洋科学史.
• This is ascertained by means of a micrometer screw, S, which moves a needle, T, in front of the dial. 弗兰克·刘易斯·戴尔. 爱迪生的生平和发明.
• About 1639 Gascoigne, a young Englishman, invented the micrometer, which enables an observer to adjust a telescope with very great precision. 李贝. 西洋科学史.
• Before the invention of the micrometer exactitude was impossible, because the adjustment of the instrume nt depended on the discrimination of the naked eye. 李贝. 西洋科学史.

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