| 单词 | micrometer screw |
| 释义 | > as lemmasmicrometer screw micrometer screw n. a screw of fine pitch attached to optical and other instruments for making fine adjustments of position. ΚΠ 1755 Philos. Trans. 1754 (Royal Soc.) 48 600 The measures taken by this instrument are determined by the contact of a piece of metal with the point of a micrometer-screw. 1788 Trans. Soc. Arts 6 190 Moved by the micrometer screw. 1872 G. R. Cutter tr. H. Frey Microscope & Microsc. Technol. i. 24 The finely constructed micrometer screw, which moves the microscope, is used for more accurate focussing. 1933 A. W. Barton Text Bk. Heat iii. 64 The second accurate way of setting the micrometer screw, namely, by observing the coincidence between the image of a fine line ruled on the bar and the cross-wire of a vertical microscope. 1992 Proc. National Acad. Sci. U.S.A. 89 4245 The control-rod micrometer screw, which is used to set the oil pressure within the probe..is now motorized. < as lemmas |
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