| 单词 | surface-hardened |
| 释义 | Definition of surface-hardened in English:surface-hardenedadjective Metallurgy
OriginMid 19th century; earliest use found in U.S. Patents. Definition of surface-hardened in US English:surface-hardenedadjective Metallurgy
OriginMid 19th century; earliest use found in U.S. Patents. |
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