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Priority claimed from DE3628007Aexternal-prioritypatent/DE3628007C1/de
Priority claimed from DE3628008Aexternal-prioritypatent/DE3628008C1/de
Application filed by Rwe Dea AgfiledCriticalRwe Dea Ag
Priority claimed from EP87111908Aexternal-prioritypatent/EP0257511B1/en
Application grantedgrantedCritical
Publication of ATE58121T1publicationCriticalpatent/ATE58121T1/en