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Bell and his assistant, Thomas Watson, conducted many experiments and finally came up with a device which they first introduced in 1876.. Bell said on the telephone: “Mr.Watson, come her[r]
Đang tải... (xem toàn văn)
Bell and his assistant, Thomas Watson, conducted many experiments and finally came up with a device which they first introduced in 1876.. Bell said on the telephone: “Mr.Watson, come her[r]
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