表面硬化的

例句：

1. 1. The steel plate was subjected to a process of surface hardening before being used in the construction.
   在施工前，钢板经历了表面硬化处理过程。
2. 2. The engineer decided to use a new material for the surface hardening of the bridge.
   工程师决定使用新材料对桥梁进行表面硬化处理。
3. 3. The company has developed a technique for surface hardening that can significantly improve the durabilityof the product.
   该公司开发了一种表面硬化技术，可以显著提高产品的使用寿命。