英语词汇“speculum metal”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	speculum metal
释义	speculum metal speculum metal n (Metallurgy) a white hard brittle corrosion-resistant alloy of copper (55–70 per cent) and tin with smaller amounts of other metals. It takes a high polish and is used for mirrors, lamp reflectors, ornamental ware, etc speculum metal speculum metal (spek -yŭ-lŭm) An alloy of copper and tin used by Newton and his successors to make telescope mirrors because it could easily be cast, ground to shape, and took a good polish. It was made obsolete by the use of glass provided with a thin highly reflective silver coating.
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