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Priority claimed from BE6/47778Aexternal-prioritypatent/BE895892A/fr
Priority claimed from BE6/47872Aexternal-prioritypatent/BE897789A/fr
Application filed by Centre Rech MetallurgiquefiledCriticalCentre Rech Metallurgique
Priority claimed from EP84870009Aexternal-prioritypatent/EP0119180B1/de
Application grantedgrantedCritical
Publication of ATE41447T1publicationCriticalpatent/ATE41447T1/de