subboard

例句：

1. 1. The engineer needs to replace the subboard in the circuit board.
   工程师需要更换电路板上的副板。
2. 2. The subboard is designed to be easily mounted on the wall.
   副板设计成可以容易地安装在墙上。
3. 3. The subboard contains a variety of sensors for temperature and humidity monitoring.
   副板上装有各种传感器用于温度和湿度监测。