surface heat treatment

例句：

1. 1.The surface heat treatment process is crucial for the durability of the material.
   表面热处理过程对于材料的使用寿命至关重要。
2. 2. The engineer used a special tool to achieve the surface heat treatment on the metal parts.
   工程师使用一种特殊的工具对金属部件进行了表面热处理。
3. 3. During the manufacturing process, the surface heat treatment ensures that the product meets the required standards.
   在制造过程中，表面热处理确保产品符合所需标准。