multi-level control system

例句：

1. 1. The multi-level controlsystem helps to improve the efficiency of theproduction process.
   这个多层次控制系统有助于提高生产过程的效率。
2. 2.The new multi-level control system hasgreatly improved the safety of the plant operation.
   新的多层次控制系统大大提高了工厂操作的安全性。
3. 3. Theengineers are working on developing a moreefficient multi-level control system for thenew machine.
   工程师们正在开发一种更高效的多层次控制系统来为新机器。