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G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
G01R11/36—Induction meters, e.g. Ferraris meters
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FR363677D1906-02-281906-02-28Compteur à courant alternatif d'après le système ferraris avec pièces mobiles sur les champs magnétiques
ExpiredFR363677A
(fr)