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Priority claimed from DE19843400656external-prioritypatent/DE3400656A1/de
Priority claimed from DE19843400648external-prioritypatent/DE3400648A1/de
Application filed by Gsr SandregenerierungsgesfiledCriticalGsr Sandregenerierungsges
Priority claimed from EP85890004Aexternal-prioritypatent/EP0149595B1/de
Application grantedgrantedCritical
Publication of ATE33105T1publicationCriticalpatent/ATE33105T1/de