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单词 blue heat
释义

Definition of blue heat in English:

blue heat

noun
Metallurgy
  • A temperature at which iron or steel assumes a bluish tint as a result of becoming covered with a film of iron oxide, typically about 300°C; frequently figurative.

Origin

Late 18th century; earliest use found in John Smeaton (1724–1792), civil engineer.

 
 

Definition of blue heat in US English:

blue heat

noun
Metallurgy
  • A temperature at which iron or steel assumes a bluish tint as a result of becoming covered with a film of iron oxide, typically about 300°C; frequently figurative.

Origin

Late 18th century; earliest use found in John Smeaton (1724–1792), civil engineer.

 
 
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更新时间:2024/12/23 17:56:21