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Application filed by Paul Grothe, Eberhard Haack, Gert Schaefer, Karlheinz Wolf, Manfred Chemnitz, Heinz Sielaff, Dieter ZanderfiledCriticalPaul Grothe
Priority to DD20560578ApriorityCriticalpatent/DD136698A1/de
Publication of DD136698A1publicationCriticalpatent/DD136698A1/de