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Application filed by Vitezslav Ing Pospisil, Vladislav Ing VykopalfiledCriticalVitezslav Ing Pospisil
Priority to CS853758ApriorityCriticalpatent/CS256420B1/en
Publication of CS375885A1publicationCriticalpatent/CS375885A1/en
Publication of CS256420B1publicationCriticalpatent/CS256420B1/en