| 单词 | hardened steel |
| 释义 | Definition of hardened steel in English:hardened steelnoun Metallurgy
OriginMid 16th century; earliest use found in Earl of Surrey (?1517–1547), poet and soldier. Definition of hardened steel in US English:hardened steelnoun Metallurgy
OriginMid 16th century; earliest use found in Earl of Surrey (?1517–1547), poet and soldier. |
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