auxiliary bus-bar

例句：

1. 1.The auxiliary bus-bar is essential for the operation of the electrical system.
   辅助总线对于电气系统的操作至关重要。
2. 2. The engineers used the auxiliary bus-bar to connect the two pieces of equipment together.
   工程师们使用辅助总线将两台设备连接在一起。
3. 3. The auxiliary bus-bar was designed to reduce the strain on the main power line.
   辅助总线的设计旨在减轻主电源线的负荷。