1797Encycl. Brit. (ed. 3) II. 585/2 On this pin are two moveable collets..to which are fixed the quadrantile wires.
英语词典包含277258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。