audio frequency transistor train dispatching telephone

例句：

1. 1.The audio frequency transistor is a crucial component in the modern communication system.
   音频频率晶体管是现代通信系统中至关重要的组件。
2. 2. The audio frequency transistor train dispatching telephone is widely used in various fields.
   音频频率晶体管列车调度电话在各个领域都有广泛应用。
3. 3. The audio frequency transistor train dispatching telephone has greatly improved the efficiency of communication.
   音频频率晶体管列车调度电话大大提高了通信效率。