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Application filed by Boleslav Ing Cernoch, Karel Vilimek, Zdenek Ing HrstkafiledCriticalBoleslav Ing Cernoch
Priority to CS843268ApriorityCriticalpatent/CS242957B1/en
Publication of CS326884A1publicationCriticalpatent/CS326884A1/en
Publication of CS242957B1publicationCriticalpatent/CS242957B1/en