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单词
speculum metal
释义
WordReference Random House Unabridged Dictionary of American English © 2024
spec
′
ulum met′al,
Metallurgy
any of several bronze alloys with a high tin content, often containing other materials, as silver, brass, lead, zinc, or arsenic, used for making mirrors and reflectors. Also called
speculum, spec
′
ulum al′loy.
1790–1800
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更新时间:2025/11/20 15:04:24