relay racks bay

例句：

1. 1.The relay racks are essential for thecommunication system.
   中继架对于通信系统至关重要。
2. 2.The relay racks are used to connectdifferent parts of the network.
   中继架用于连接网络的不同部分。
3. 3. The relayracks are designed towithstand high voltage and temperature.
   中继架设计用于承受高压和高温。