Stock Photo - Electric dynamoelectric machine with three-phase impeller field, produced by Maschinenfabrik Oerlikon, Germany, illustration from L'Industria, Rivista tecnica ed economica illustrata, Milan, 1892. Milan, Museo Nazionale della Scienza e della Tecnica 'Leonardo Da Vinci' (Science and Technology Museum)

Stock Photo: Electric dynamoelectric machine with three-phase impeller field, produced by Maschinenfabrik Oerlikon, Germany, illustration from L'Industria.

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