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Application filed by Zdenek LedrfiledCriticalZdenek Ledr
Priority to CS556176ApriorityCriticalpatent/CS182727B1/cs
Publication of CS182727B1publicationCriticalpatent/CS182727B1/cs
CS556176A1976-08-271976-08-27Voltage decrease indication circuit for one phase from three-phase supply network esp. for appliances disconnecting
CS182727B1
(en)