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Significats de duplex telegraphy en anglès

Encara no tenim significats per a "duplex telegraphy".
Ús de duplex telegraphy en anglès
1
He brought out duplex telegraphy and suggested a printing telegraph for the use of gold and stock quotations.
Hidden Treasures; Or, Why Some Succeed While Others Fail
2
This was called duplex telegraphy.
Masters of Space / Morse and the Telegraph; Thompson and the Cab...
3
Edison invented duplex telegraphy by which two messages could be sent over the same wire in the same direction at the same time.
Masters of Space / Morse and the Telegraph; Thompson and the Cab...
4
In 1842, he discovered, with Dr. Fisher, the principle of duplex telegraphy, and he was also the first to experiment with wireless telegraphy.
Samuel F. B. Morse, His Letters and Journals / In Two Volumes, V...
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