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Application filed by Bohumir Ing Balek, Jiri Slezak, Stanislav Ing Slezak, Leo HolubfiledCriticalBohumir Ing Balek
Priority to CS844087ApriorityCriticalpatent/CS241941B1/en
Publication of CS408784A1publicationCriticalpatent/CS408784A1/en
Publication of CS241941B1publicationCriticalpatent/CS241941B1/en