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Priority claimed from DE19813139422external-prioritypatent/DE3139422A1/en
Priority claimed from DE3210383Aexternal-prioritypatent/DE3210383C2/en
Application filed by Al Ko Polar Maschf GmbhfiledCriticalAl Ko Polar Maschf Gmbh
Priority claimed from EP82108175Aexternal-prioritypatent/EP0076391B1/en
Application grantedgrantedCritical
Publication of ATE18694T1publicationCriticalpatent/ATE18694T1/en