case-harden編輯正在努力提供更完整的內容，建議 20 分鐘後再回來看看case-hardencase-harden — 動詞動詞1. to harden the surface of (metal) by a process such as carburizing1.動詞釋義表面硬化to harden the surface of (metal) by a process such as carburizing例句The steel was case-hardened to improve wear resistance.