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Application filed by Г. Б. ТолкачевfiledCriticalГ. Б. Толкачев
Priority to SU1765010ApriorityCriticalpatent/SU420865A1/ru
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Dispositivo per la conversione di vibrazioni acustiche in oscillazioni e viceversa, dotato di almeno un elemento elettrete a condensatore, collegato ad un circuito elettronico.