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Telegraphy - Wikipedia, the free encyclopedia
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日期:2024-07-10
1 Terminology 2 History 2.1 Optical telegraph 2.2 Electrical telegraphs 2.2.1 Early Developments 2.2.2 Commercial Telegraphy 2.2.2.1 Cooke and Wheatstone system 2.2.2.2 Morse system 2.2.3 Telegraphic improvements 2.2.4 Teleprinters 2.3 Oceanic telegraph ....看更多