1. steel that has been hardened by immersing it in water or oil to cool it. 
   浸入水或油中冷却硬化的钢。
2. Steel derricks rose to meet our eyes as we drew nearer to the oil fields. 
   我们快到油田时看到了矗立的井架。
3. Hardening means make harder. 
   淬火就是促使变硬。
4. hardening something by heat treatment. 
   通过热处理使某物变硬。
5. abnormal hardening or thickening of tissue. 
   组织不正常的变厚或硬化。

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• 1. 钢材淬火油
  局部淬火[硬化] steel hardening oil...钢材淬火油 step hardening...分级淬火 stepped hardening
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