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Application filed by Menzel Karl Heinz, Reichel Bernhard, Zaehr Hans Joachim, Bengs Karl Heinz, Kahl SiegfriedfiledCriticalMenzel Karl Heinz
Publication of CS485481A1publicationCriticalpatent/CS485481A1/cs
Publication of CS245005B1publicationCriticalpatent/CS245005B1/cs