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Keywords from Image Description:
Rx marconi. circuit original Rcepteur cohreur tube de limaille de Guglielmo Marconi Ce rcepteur d'ondes hertziennes permis de raliser les premires liaisons radios grande distance en radiotlgraphie par Guglielmo Marconi en Brevet Guglielmo Marconi Fjmm Category in radio Coherers Circuit images that should use vector graphics