dead front switchboard

例句：

1. 1. The dead front switchboard was a critical component of the emergency response system.
   死前交换机是紧急响应系统的关键组件。
2. 2.The pre-terminal switchboard was designed to handle high volumes of traffic during peak hours.
   预终端交换机设计用来在高峰时段处理大量交通流量。
3. 3.The terminal switchboard was responsible for managing and controlling all communication devices within the building.
   终端交换机负责管理和控制大楼内所有通信设备。