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电报发展史
andreworaf072026
21 days ago
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电报诞生于19世纪中叶,最初作为一类远距离信息传递方式,极大地影响了当时的社会面貌。早期的电报系统依赖于莫尔斯信号进行信息编码,并由专业的操作员进行??
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