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Priority claimed from BE6/48215Aexternal-prioritypatent/BE904545A/fr
Priority claimed from BE6/48253Aexternal-prioritypatent/BE905256A/fr
Priority claimed from BE6/48278Aexternal-prioritypatent/BE905968R/fr
Application filed by Centre Rech MetallurgiquefiledCriticalCentre Rech Metallurgique
Priority claimed from EP19870870041external-prioritypatent/EP0240482B1/de
Application grantedgrantedCritical
Publication of ATE56643T1publicationCriticalpatent/ATE56643T1/de