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Application filed by Karel Prochazka, Kaufman Karel, Jaroslav Ing RuzekfiledCriticalKarel Prochazka
Priority to CS885964ApriorityCriticalpatent/CS271884B1/en
Publication of CS596488A1publicationCriticalpatent/CS596488A1/en
Publication of CS271884B1publicationCriticalpatent/CS271884B1/en