Telegraph and Telephone Networks 2024 pdf epub mobi 电子书


Telegraph and Telephone Networks

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发表于2024-11-28

Telegraph and Telephone Networks 2024 pdf epub mobi 电子书

Telegraph and Telephone Networks 2024 pdf epub mobi 电子书

Telegraph and Telephone Networks 2024 pdf epub mobi 电子书



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出版者:Rosen Pub Group
作者:Jarnow, Jesse
出品人:
页数:32
译者:
出版时间:2003-8
价格:$ 27.06
装帧:LIB
isbn号码:9780823940257
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Telegraph and Telephone Networks 2024 pdf epub mobi 电子书 图书描述

In 1848, it could take more than a month for a letter from New York to be delivered to California. By 1861, more than 2,000 telegraph offices dotted cities and towns throughout the United States. Telegraph messages could reach their destinations within hours. In 1876, when Alexander Graham Bell offered to sell his new invention--the telephone--to the Telegraph Company, it declined, calling the telephone a toy. By 1900, there were 800,000 telephones in the country.

Telegraph and Telephone Networks 2024 pdf epub mobi 电子书

Telegraph and Telephone Networks 2024 pdf epub mobi 电子书
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