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Priority claimed from SE7910171Aexternal-prioritypatent/SE445690B/en
Priority claimed from SE8007350Aexternal-prioritypatent/SE452218B/en
Application filed by Asea AbfiledCriticalAsea Ab
Priority claimed from EP80107450Aexternal-prioritypatent/EP0030338B1/en
Application grantedgrantedCritical
Publication of ATE12556T1publicationCriticalpatent/ATE12556T1/en