| 单词 | bottom tool |
| 释义 | > as lemmasbottom tool bottom tool n. any of various tools used either from below, or in forming the lower part or bottom of something. ΘΚΠ society > occupation and work > equipment > machine tool > [noun] > specific tools hook1680 rough grinder1777 side tool1804 bottom tool1819 broad1846 sweep1847 wobbler1875 knurl1879 cam-cuttera1884 fly-cutter1884 1819 Amer. Farmer 14 May 51/1 The upper or top-drawing spade is narrow at the end, and the spade used for the lower part, or bottom tool, is almost pointed. 1839 J. Millington Elem. Civil Engin. 329 The bottom tool is inserted in the hole in the anvil, the heated iron laid upon it, and the top tool held by a long handle, is placed over it. 1874 E. H. Knight Amer. Mech. Dict. I. 346/2 Bottom-tool,..a turning-tool having a bent-over end, for cutting out the bottoms of cylindrical hollow work. 1918 Handbk. Seaman Gunners i. 1 The work is held on the bottom tool while the top one is struck with a sledge. 1997 Metalworking Production May 76/3 Previously, in-process gauging methods have centred on the bottom tool and the outside surface faces of the bent component. < as lemmas |
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