・この動画「

通信史（一）古代通信到电报时代

」@bilibili.comと
　　↓↓↓一緒に視聴されています(Often Viewed With)：↓↓↓
・第一次有人把无线电波传送信息的原理，解释得如此简单粗暴清晰
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・发明无线电的人真是个天才啊
・摩斯电码输入法🤔️

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