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Application filed by Vaclav Votapek, Jan Chlumecky, Josef Ing Solc, Prachar OtakarfiledCriticalVaclav Votapek
Priority to CS847418ApriorityCriticalpatent/CS242279B1/cs
Publication of CS741884A1publicationCriticalpatent/CS741884A1/cs
Publication of CS242279B1publicationCriticalpatent/CS242279B1/cs