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词汇 speculum metal
释义
speculum metal
noun [ U ] uk/ˈspek.jə.ləm ˌmet.əl/ us/ˈspek.jə.ləm ˌmet̬.əl/
(旧时制镜用的)铜锡合金,镜青铜
a mixture of copper and tin that was used in the past to make mirrors
Mirrors made of speculum metal may have also been produced in China and India. 中国和印度可能也生产过用镜青铜做成的镜子。
    更多例句
  • Mirrors of speculum metal were hard to produce and were only owned by the wealthy.
  • Speculum metal is an alloy of around two-thirds copper and one-third tin.
  • A small portion of speculum metal, when analysed, yielded iron.
  • Speculum metal and brass cannot be soldered together by the ordinary methods.
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