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Application filed by Josef Dipl Tech Coufal, Frantisek Vegricht, Ivan Ing DanafiledCriticalJosef Dipl Tech Coufal
Priority to CS876652ApriorityCriticalpatent/CS269912B1/en
Publication of CS665287A1publicationCriticalpatent/CS665287A1/en
Publication of CS269912B1publicationCriticalpatent/CS269912B1/en