?音频载波电报设备
...载波电报终端机：voice-frequency carrier telegraph terminal 音频载波电报设备：voice-frequency carrier telegraph equipment 音频信号接收器：voice-frequency signal receiver ..
英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。