party-line telephone control board with VF selective calling

例句：

1. 1.The party-line telephone control board is used to manage the communication lines between different devices.
   电话线路控制板用于管理不同设备之间的通信线路。
2. 2. The phone company's party-line telephone control board was designed to improve network efficiency.
   电话公司的电话线路控制板设计用来提高网络效率。
3. 3.The technician replaced the faulty party-line telephone control board with a new one.
   技术人员用一个新的电话线路控制板替换了故障的电路板。