单词 | surface hardening |
释义 | Definition of surface hardening in English:surface hardeningnoun Metallurgy
OriginMid 19th century; earliest use found in Repertory Patent Inventions. Definition of surface hardening in US English:surface hardeningnoun Metallurgy
OriginMid 19th century; earliest use found in Repertory Patent Inventions. |
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