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H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
H02K—DYNAMO-ELECTRIC MACHINES
H02K31/00—Acyclic motors or generators, i.e. DC machines having drum or disc armatures with continuous current collectors
H02K31/04—Acyclic motors or generators, i.e. DC machines having drum or disc armatures with continuous current collectors with at least one liquid-contact collector
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FR573918D1922-12-091923-11-29Perfectionnements aux génératrices ou moteurs à courant électrique homopolaires
ExpiredFR573918A
(fr)