gas carburizing

例句：

1. 1. The steel was gas carburized before being sent to the machine shop for further processing.
   钢材在送往机械车间进行进一步加工之前，先进行了气体渗碳处理。
2. 2. During the manufacturing process, the metal is often gas carburized to enhanceits strength and hardness.
   在制造过程中，金属经常进行气体渗碳处理，以增强其强度和硬度。
3. 3.This technique is used to produce parts with a high level of hardness and wear resistance, which can be achieved through gas carburizing.
   这种技术用于生产具有高硬度和耐磨性的零件，可以通过气体渗碳来实现。