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Priority claimed from CH7674859Aexternal-prioritypatent/CH370837A/de
Priority claimed from CH7686559Aexternal-prioritypatent/CH370476A/de
Application filed by Bbc Brown Boveri & CiefiledCriticalBbc Brown Boveri & Cie
Publication of BE593847ApublicationCriticalpatent/BE593847A/fr