3479249 Alexander Graham Bell\'s photo phone, 1891; (add.info.: Transmitter of Bell\'s Photo phone: vibrations of the diaphragm at the end of the mouthpiece tube caused pulses of light to be transmitted to receiver which had light-sensitive selenium. London, 1891.); Universal History Archive/UIG; out of copyright.

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Creative#:

TOP27536258

Source:

達志影像

Authorization Type:

RM

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須由TPG 完整授權

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No

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No

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No

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