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Application filed by Frantisek Kozelka, Viktor Zenk, Frantisek KrsnakfiledCriticalFrantisek Kozelka
Priority to CS869904ApriorityCriticalpatent/CS261966B1/en
Publication of CS990486A1publicationCriticalpatent/CS990486A1/en
Publication of CS261966B1publicationCriticalpatent/CS261966B1/en