automatic radiotelegraph keying device

例句：

1. 1. The automatic radiotelegraph keying device is a crucial component in the communication system.
   自动无线电电报键控设备是通信系统中的关键组成部分。
2. 2. The new automatic radiotelegraph keying device has greatly improved the efficiency of our dispatch system.
   新的自动无线电电报键控设备大大提高了我们的调度系统的效率。
3. 3. The automatic radiotelegraph keying device is used to transmit and receive signals over long distances without the need for human intervention.
   自动无线电电报键控设备用于在无需人工干预的情况下，在长距离上传输和接收信号。