lead bath hardening

例句：

1. 1. The process of lead bath hardening is used to improve the strength and durability of metals.
   铅浴硬化过程用于提高金属的强度和耐用性。
2. 2.In the early days of the industry, workers would often use lead bath hardening to protect their skin from exposure to chemicals.
   在工业初期，工人经常使用铅浴硬化来保护皮肤免受化学物质的侵害。
3. 3.The engineer carefully monitored the temperature and pressure during the lead bath hardening process to ensure optimal results.
   工程师仔细监控了铅浴硬化过程中的温度和压力，以确保获得最佳结果。