| 单词 | spring dart |
| 释义 | > as lemmasspring dart ΚΠ 1781 London Gaz. No. 12216. John Hobson, formerly of Plum-tree-court, late of Feathers-court, both in Holborn, Spring-dart-maker. 1883 W. S. Gresley Gloss. Terms Coal Mining 232 Spring-dart, an arrow or fish-headed boring tool for extricating a lost implement, or for withdrawing lining tubes. 1910 W. H. Maxwell & J. T. Brown Encycl. Munic. & Sanitary Engin. 52/1 Latch tool for picking up pipes from a bore-hole... Spring dart for same purpose. < as lemmas |
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