![](https://nthumb.tpgimages.com/mid2_com_img/1339/16581/TOP15881733.jpg)
Carbon microphone, invented in 1878 by David Edward Hughes (1831-1900), English inventor. From R. Wormell Electricity in the Service of Man, London, 1890. Engraving
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Details
Creative#:
TOP15881733
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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