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1. Oxford Dictionary

   work-harden

   • v.
     toughen (a metal) as a result of cold-working

   • verb: work-harden, 3rd person present: work-hardens, gerund or present participle: work-hardening, past tense: work-hardened, past participle: work-hardened

   • noun: work-hardening

2. • 釋義

   v.

   動詞

   • 1. toughen (a metal) as a result of cold-working the hammering has work-hardened the metal inside and out the rest of the strength is generated by work-hardening
3. • 更多解釋

   work-harden

   • IPA[ˈwərkˌhärd(ə)n]

   美式

   • v.
     toughen (a metal) as a result of cold-working: the hammering has work-hardened the metal inside and out the rest of the strength is generated by work-hardening

   Oxford American Dictionary