three-step control

例句：

1. 1. The company implemented a three-step control system to improve efficiency.
   该公司实施了一个三步控制系统来提高效率。
2. 2. The new policy requires a three-step control process before implementing changes.
   新政策要求在实施改变之前需要进行三步控制过程。
3. 3. During the emergency, the three-step control measures were quickly deployed to prevent further damage.
   在紧急情况下，迅速部署了三步控制措施以防止进一步损害。