contour quenching

例句：

1. 1. The steel was subjected to a process that enhances its toughness and strength.
   这种钢经过一个过程，增强了其韧性和强度。
2. 2.This method is used in the manufacturing of high-performance alloys for aircraft engines.
   这种方法用于制造高性能的航空发动机合金。
3. 3. The engineers were able to achieve this through the use of contour quenching techniques.
   工程师们通过使用轮廓淬火技术实现了这一点。