Thomas Edison's first invention was the automatic telegraph repeater. He was already an expert on the telegraph before he came up with a gadget that sent telegraph signals between unmanned stations. Thanks to Edison, people were then able to send several telegraph messages simultaneously.

电报自动转发器是托马斯·爱迪生的第一个发明。他发明的这种装置，用于在无人看管的两站之间传输电报信号，在此项发明前，爱迪生就已经是位电报专家了。幸亏有爱迪生，我们才能在同一时间传送好几封电报讯息。