voice frequency multi-channel carrier telegraphy

例句：

1. 1. Voicefrequency multi-channel carrier telegraphy is a technology that can transmit voice signals over long distances without the need for wires.
   声频多通道载波电报是一种可以在没有电线的情况下，远距离传输语音信号的技术。
2. 2. In this new model, the voice frequency multi-channel carrier telegraphy system has been optimized to improve communication efficiency.
   在这个新模型中，声频多通道载波电报系统已经被优化以提高通信效率。
3. 3. The voice frequency multi-channel carrier telegraphy system is widely used in various industries, such as telecommunications and transportation.
   声频多通道载波电报系统广泛应用于电信和交通等多个行业。