Many inventors had been working on the idea of sending human speech by wire, but Bell was the first to succeed.. The invention of the telephone grew out of improvements Bell had made to [r]
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Many inventors had been working on the idea of sending human speech by wire, but Bell was the first to succeed.. The invention of the telephone grew out of improvements Bell had made to [r]
Ngày đăng: 07/11/2021, 18:53
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