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Priority claimed from FR8512054Aexternal-prioritypatent/FR2585597B1/en
Priority claimed from FR8608427Aexternal-prioritypatent/FR2599650B2/en
Application filed by Pechiney AluminiumfiledCriticalPechiney Aluminium
Application grantedgrantedCritical
Publication of ATE36477T1publicationCriticalpatent/ATE36477T1/en