結果 : how was the first telegraph invented
1:31

Invention of the Telegraph

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The Telegraph: The Civil War Text Machine

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Constructing the First Underwater Telegraph | The Engineering that Built the World (S1)

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How the Telegraph Changed Communication

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How The Telegraph Was Invented!

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The Tragedy That Led Samuel Morse to Develop the Telegraph

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The Invention of the Telegraph

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The Telegraph A History

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19:31

First 100 Years: Western Union - Telegraph to Fax (1950s)

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The Surprising History of the Morse Telegraph: the facts you didn't know

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0:37

Who invented the first telegraph and when?

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The Invention of the Telegraph | Awesome USA | Horrible Histories

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History of the Telephone and Telegraph

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The Week in History Ep. 22 - The Telegraph Age

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Morse Code Telegraph Key: Development & History

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When was the telegraph invented?

Rapid Responses
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4:31

Western Union Telegraph Line

Northwest Lineman College
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