| 单词 | half-round drill |
| 释义 | > as lemmashalf-round drill 2. Of a tool: characterized by having a semicircular or semi-cylindrical cutting edge, as half-round chisel, half-round file, half-round drill, etc. ΘΠ society > occupation and work > equipment > cutting tool > [adjective] > specific attributes rank1625 cross-cut1645 landed1971 society > occupation and work > equipment > tool > types of tools generally > [adjective] > others barreda1571 hulch-backed1611 soft-headed1640 boneheaded?1750 shambling1829 hard-faced1862 bushed1907 1635 J. Babington Pyrotechnia xxxvi. 43 Then having boared your holes at proportionable distance, cut so many hollow groofes with a googe or halfe round chisell. 1678 J. Moxon Mech. Exercises I. ii. 33 With the edge of an half round file. 1759 Goods Mrs Custis Had Oct. in M. Washington Worthy Partner (1994) 112 3 half round Rasps. 1884 F. J. Britten Watch & Clockmakers' Handbk. (new ed.) 95 For long holes of large diameter nothing beats a half-round drill. 1971 J. A. Dolan Motor Vehicle Technol. v. 51 If the point of the drill wanders from the centre of the intended hole it can be drawn..by cutting a groove from the countersink to the true hole centre with a centre punch or half round chisel. 2008 Lapidary Jrnl. Jewelry Artist Apr. 17/1 I recommend a set of #1 files called Habilis files for beginners, which includes a half round, flat, round, triangular, and square file. < as lemmas |
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