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Application filed by Bohumil Novotny, Palik FrantisekfiledCriticalBohumil Novotny
Priority to CS834823ApriorityCriticalpatent/CS237517B1/en
Publication of CS482383A1publicationCriticalpatent/CS482383A1/en
Publication of CS237517B1publicationCriticalpatent/CS237517B1/en