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current | 14:35, 14 November 2010 | 721 × 882 (132 KB) | Rbmn | {{Information |Description={{en|1=In 1889, Arthur Krebs added an electric motor of his own to the Dumoulin (builder of the Foucault gyrocope) marine gyrocope, in order to give a gyrocompass to the french experimental submarine ''Gymnote''. Giving the |
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