| 单词 | crown saw |
| 释义 | > as lemmascrown saw crown saw n. now rare a trepan or other type of saw with teeth set around the end of a cylinder; cf. senses 14 and 17. ΘΚΠ society > occupation and work > equipment > cutting tool > saw > [noun] > crown-saw crown saw1749 trepan saw1839 hole saw1961 1749 T. Gataker tr. H. F. Le Dran Operations in Surg. 4 Sometimes we perforate the bone, as with a crown saw [Fr. une espece de scie faite en couronne], called a trepan. 1852 C. Tomlinson Cycl. Useful Arts (1854) I. 145/2 The flakes are made circular, and their centres pierced by means of a crown saw which has a centrebit in the axis. 1937 S. Lister Saws & Sawing 13 Crown saws, or barrel saws, are used for cutting circular blocks from planks. 2006 J. Kirkup Evol. Surg. Instruments xx. 295/2 By the eighteenth century, crown saws had removable centering pins that acted as perforators. < as lemmas |
| 随便看 |
英语词典包含1132095条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。