lead tempering

例句：

1. 1. The steel wassubjected to lead tempering to improve itsstrength and toughness.
   钢材经过铅淬火处理以提高其强度和韧性。
2. 2. During the manufacturingprocess, the steel is often subjected tolead tempering to achieve the desired properties.
   在制造过程中，钢材经常经过铅淬火以获得所需的性能。
3. 3. The engineerexplained that lead temperingis a technique used to strengthenthe steel structure without adding additional material.
   工程师解释说，铅淬火是一种用于强化钢结构而不添加额外材料的技术。