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Priority claimed from BE6/47089Aexternal-prioritypatent/BE881910A/fr
Priority claimed from BE6/47121Aexternal-prioritypatent/BE882639A/fr
Application filed by Centre Rech MetallurgiquefiledCriticalCentre Rech Metallurgique
Priority claimed from EP81200183Aexternal-prioritypatent/EP0034863B1/de
Application grantedgrantedCritical
Publication of ATE22178T1publicationCriticalpatent/ATE22178T1/de