magnetic arc controller

例句：

1. 1. The magnetic arc controller is an essential component of the power system.
   磁弧控制器是电力系统的一个必不可少的组成部分。
2. 2. The magnetic arc controller was designed to prevent electrical equipment from overheating.
   磁弧控制器被设计用来防止电气设备过热。
3. 3. The magnetic arc controller has been shown to improve the efficiency of the power system.
   磁弧控制器已被证明可以提高电力系统的效率。