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Priority claimed from DE19813119813external-prioritypatent/DE3119813A1/en
Application filed by Maschinenfabrik Korfmann Gmbh, Ruhrkohle AktiengesellschaftfiledCriticalMaschinenfabrik Korfmann Gmbh
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Publication of ATE9506T1publicationCriticalpatent/ATE9506T1/en