File:Brushes 1917 High Current Copper Brush Commutated Dynamo Attribution.jpg

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Brushes_1917_High_Current_Copper_Brush_Commutated_Dynamo_Attribution.jpg ‎(749 × 600 pixels, file size: 154 KB, MIME type: image/jpeg)

A 1917 low voltage bipolar dynamo built for electrolytic work with a large size commutator and brushes - Image by DMahalko

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current20:50, 1 March 2012Thumbnail for version as of 20:50, 1 March 2012749 × 600 (154 KB)Beichner (talk | contribs)

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