| 单词 | spirit bubble |
| 释义 | > as lemmasspirit bubble spirit bubble n. the air bubble in a spirit level (see spirit level n.); (also) the spirit level itself. ΚΠ 1791 G. Adams Geom. & Graphical Ess. 378 The tube..with the spirit buble, is fixed to the telescope by a joint at one end. 1862 Internat. Exhib.: Illustr. Catal. Industr. Dept. II. xiii. §2947 When the instrument is turned in any direction, the spirit bubble will be kept in the centre of its run. 1916 J. A. L. Waddell Bridge Engin. II. 2007 A type of hand-level consisting of a small tube with a spirit bubble mounted on the upper side and a refracting prism or a reflector to show the bubble in the field of vision. 2004 Geografiska Annaler A. 86 56/1 The albedometer was mounted on a camera tripod and readings were made in a horizontal (i.e. surface-parallel) plane by means of a spirit bubble. < as lemmas |
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