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Priority claimed from FR8027945Aexternal-prioritypatent/FR2496632A1/fr
Priority claimed from FR8027946Aexternal-prioritypatent/FR2496633A1/fr
Priority claimed from FR8123791Aexternal-prioritypatent/FR2518522A2/fr
Application filed by Aluminium PechineyfiledCriticalAluminium Pechiney
Priority claimed from EP81420191Aexternal-prioritypatent/EP0055681B1/de
Application grantedgrantedCritical
Publication of ATE8378T1publicationCriticalpatent/ATE8378T1/de