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Application filed by Vaclav Ing Mayer, Zdenek Ing Svatos, Vitezslav KadlecfiledCriticalVaclav Ing Mayer
Priority to CS84914ApriorityCriticalpatent/CS239723B1/en
Publication of CS91484A1publicationCriticalpatent/CS91484A1/en
Publication of CS239723B1publicationCriticalpatent/CS239723B1/en