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Application filed by Pavol Ing Balaz, Marian KorbackafiledCriticalPavol Ing Balaz
Priority to CS871588ApriorityCriticalpatent/CS272630B1/en
Publication of CS871588A1publicationCriticalpatent/CS871588A1/en
Publication of CS272630B1publicationCriticalpatent/CS272630B1/en