| 单词 | ratchet drill |
| 释义 | > as lemmasratchet drill ratchet drill n. ΚΠ 1844 Mechanics' Mag. 27 Jan. 62 (table) Ratchet drill (improved). 1902 J. Conrad Heart of Darkness in Youth iii. 168 I lived in an infernal mess of rust, filings, nuts, bolts, spanners, hammers, ratchet-drills—things I abominate, because I don't get on with them. 1960 H. S. Arnow Seedtime on Cumberland x. 266 The boring of holes for the thousands of such pegs was not the easy job it is today with a ratchet drill. < as lemmas |
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