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Application filed by Jindrich Jahelka, Zdenek Ing Kopecek, Miloslav Ing DeverafiledCriticalJindrich Jahelka
Priority to CS844628ApriorityCriticalpatent/CS252162B1/en
Publication of CS462884A1publicationCriticalpatent/CS462884A1/en
Publication of CS252162B1publicationCriticalpatent/CS252162B1/en