File:Wireless Telegraphy spark gap transmitter for wireless telegraphy.png
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Wireless_Telegraphy_spark_gap_transmitter_for_wireless_telegraphy.png (476 × 599 pixels, file size: 143 KB, MIME type: image/png)
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current | 22:37, 10 February 2012 | 476 × 599 (143 KB) | Beichner (talk | contribs) |
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