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| View Original: | Siemens_Hefner-Alteneck_Dynamomaschine.png (651x800) | |||
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| Courtesy of: | commons.wikimedia.org | More Like This | ||
| Keywords: Siemens Hefner-Alteneck Dynamomaschine.png Siemens Hefner-Altenecksche Dynamomaschine Bibliothek allgemeinen und praktischen Wissens für Militäranwärter Band III 1905 / Deutsches Verlaghaus Bong Co Berlin Leipzig Wien Stuttgart Scan made by Kogo Public Domain because copyright expired thumb left PD-old Bipolar dynamos | ||||
