| 单词 | speculum metal |
| 释义 | > as lemmasspeculum metal a. speculum metal, an alloy of copper and tin used for making specula. Also speculum steel. ΘΚΠ society > occupation and work > materials > derived or manufactured material > metal > alloy > [noun] > other alloys of copper and tin bell-metal1541 speculum metal1796 temper1875 speculum1912 1796 Philos. Trans. (Royal Soc.) 86 438 The composition in common use, which contains the greatest proportion of tin, is called speculum metal. 1807–10 R. Tannahill Poems (1846) 76 'Twas by the rays' reflected heat, Frae speculum steel. 1818 W. Phillips Outl. Mineral. & Geol. (ed. 3) 46 If the proportion of tin [to copper] amount to one third, it forms speculum metal, used for reflecting telescopes. 1873 E. Spon Workshop Receipts 1st Ser. 13/1 2 lbs. copper, 1 lb. tin, 1 oz. arsenic, form a good speculum metal. < 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。