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Priority claimed from DE19883834762external-prioritypatent/DE3834762A1/en
Priority claimed from DE19883835381external-prioritypatent/DE3835381A1/en
Application filed by Ruhrgas AgfiledCriticalRuhrgas Ag
Priority claimed from EP89118554Aexternal-prioritypatent/EP0363834B1/en
Application grantedgrantedCritical
Publication of ATE104416T1publicationCriticalpatent/ATE104416T1/en