relay preselector

例句：

1. 1. The relay preselector is responsible for selecting the next relay station to transmit data.
   接力预选器负责选择下一个接力站来传输数据。
2. 2.During the race, the relay preselector is used to select the fastest relay team.
   在比赛中，接力预选器被用来选择最快的接力队伍。
3. 3. The relay preselector was designed to improve the efficiency of the relay system.
   接力预选器的设计目的是为了提高接力系统的工作效率。