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Application filed by Bohumil Novotny, Palik FrantisekfiledCriticalBohumil Novotny
Priority to CS852141ApriorityCriticalpatent/CS245991B1/en
Publication of CS214185A1publicationCriticalpatent/CS214185A1/en
Publication of CS245991B1publicationCriticalpatent/CS245991B1/en