名词
中文翻译：主引擎电报机
同义词：
['main engine telegrapher', 'main engine telegraph', "main engine telegrapher'sinstrument"]
例句：
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1. The main engine telegraph is used to transmit signals over long distances.
主引擎电报机用于远距离传输信号。
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2. The main engine telegraph was invented by a man named Edison.
主引擎电报机是由爱迪生发明的。
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3. Main engine telegraphs were used in the early days of telephone communication.
在电话通信的早期，主引擎电报机被使用。