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ANCIENS LOUIS A Ets
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ANCIENS LOUIS A Ets
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Publication of FR559343ApublicationCriticalpatent/FR559343A/fr
H05G1/58—Switching arrangements for changing-over from one mode of operation to another, e.g. from radioscopy to radiography, from radioscopy to irradiation or from one tube voltage to another
FR559343D1921-12-021922-12-02Perfectionnements aux commandes électriques
ExpiredFR559343A
(fr)