| 单词 | spirit tube |
| 释义 | > as lemmasspirit tube spirit tube n. = spirit level n. ΚΠ 1725 S. Wyld Pract. Surveyor App. 155 Upon this Tellescope is fixed, with two small Screws, the Spirit Tube, and Bubble therein, which Bubble rest exactly in the Middle of the Tube, when the Tellescope is set truly level. 1842 Penny Cycl. XXII. 359/1 The spirit-tube is used in determining the relative heights of ground at two or more stations. 1908 G. Ellis Mod. Pract. Joinery (ed. 3) xxiv. 398 The same advantages, to a lesser degree, can be obtained by fitting the stock with a small spirit tube. 2005 Brit. Patent 2,403,537 3 The spirit tube or tubes may be rotatable relative to the beam. < as lemmas |
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