cordless telephone switch board

例句：

1. 1.The cordless telephone switch board is a crucial part of our office system.
   无绳电话交换机板是我们办公室系统的关键部分。
2. 2.The engineer replaced the cordless telephone switch board with a new one.
   工程师用一个新的替换了旧的无绳电话交换机板。
3. 3.The cordless telephone switch board was designed to be easy to install and maintain.
   无绳电话交换机板的设计是为了易于安装和维护。