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Priority to ES85501ApriorityCriticalpatent/ES85501A1/es
Publication of ES85501A1publicationCriticalpatent/ES85501A1/es
ES85501A1923-05-161923-05-16Procedimiento para perfeccionar el grado de eficacia de los transformadores de multiplicación de frecuencia.
ExpiredES85501A1
(es)