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Application filed by Kratky Bohumil, Hajek Karel, Hochmannova Libuse, Husak Jiri, Frantisek Ing Herrmann, Vaclav Ing ZamastilfiledCriticalKratky Bohumil
Priority to CS867315ApriorityCriticalpatent/CS258842B1/en
Publication of CS731586A1publicationCriticalpatent/CS731586A1/en
Publication of CS258842B1publicationCriticalpatent/CS258842B1/en