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Application filed by Bohumir Ing Balek, Jiri Slezak, Stanisla Ing Slezak, Marie Rndr SkrivankovafiledCriticalBohumir Ing Balek
Priority to CS829386ApriorityCriticalpatent/CS257323B3/en
Publication of CS829386A1publicationCriticalpatent/CS829386A1/en
Publication of CS257323B3publicationCriticalpatent/CS257323B3/en