cyanide hardening

例句：

1. 1. The process of cyanide hardening is crucial for the production of high-quality steel.
   氰化物硬化过程对于生产高质量钢材至关重要。
2. 2.During the cyanide hardening process, the metal undergoes a chemical reaction that changes its properties.
   在氰化物硬化过程中，金属经历化学反应，改变其性质。
3. 3.The cyanide hardening process is widely used in the manufacturing industry to improve the strength and durability of materials.
   氰化物硬化工艺广泛应用于制造业，以提高材料强度和耐用性。