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PSM V09 D091 Morse key and register
Zusammenfassung
Morse key and register
Public domain photograph related to electrical equipment, industrial development, free to use, no copyright restrictions image - Picryl description
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Tags
Schaltpläne
Populärwissenschaftliche Monatsillustrationen Band 9
gerade Tasten
Telegrafie
Erfindungen
Wissenschaftsgeschichte
Populärwissenschaft
Datum
1876
Quelle
Wikimedia Commons
Link
Copyright-info
public domain