drop feed carburizing

例句：

1. 1. The drop feed carburizing process is crucial for the quality of the steel product.
   下料渗碳过程对于钢铁产品质量至关重要。
2. 2. The drop feed carburizing technique has been widely used in the manufacturing industry.
   下料渗碳技术在制造业中得到了广泛应用。
3. 3. The drop feed carburizing process can effectively improve the hardness and wear resistance of the steel product.
   下料渗碳工艺可以有效提高钢铁产品的硬度和耐磨性能。