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单词 invar
释义
Invar
nnoun.substancean alloy of iron and nickel having a low coefficient of thermal expansion; used in tuning forks and measuring tapes and other instruments
Domain Usage:trademark
Hypernyms:alloy metal
Inherited Hypernyms:invaralloymixturesubstancematterphysical entityentity
Inherited Hypernyms:invaralloymixturesubstancepartrelationabstractionentity
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