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Дата регистрации:29 июня 2023 23:23
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Немного о себе: During the 1870's, two well known inventors both independently designed devices that could transmit sound along electrical cables. Those inventors were Alexander Graham Bell and Elisha Moving Price Montreal Gray. Both devices were registered at the patent office within hours of each other. There followed a bitter legal battle over the invention of the telephone, which Bell subsequently won.В™ The telegraph and telephone