英语词汇“spring dart”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

> as lemmas

spring dart

† spring dart n. Mining Obsolete a tool equipped with an arrowhead-shaped tip with hinged projections that are extended outward by one or more springs, used for retrieving lengths of piping from boreholes.

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.

extracted from springn.¹

as lemmas

单词	spring dart
释义	> as lemmas spring dart † spring dart n. Mining Obsolete a tool equipped with an arrowhead-shaped tip with hinged projections that are extended outward by one or more springs, used for retrieving lengths of piping from boreholes. 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. extracted from springn.¹ < as lemmas
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