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Application filed by Jaromira Ing Hradecka, Marie Ing Neubauerova, Kratky Bohumil, Hajek Karel, Jaroslav Phmr Makes, Ditrych Zdenek, Frantisek NovakfiledCriticalJaromira Ing Hradecka
Priority to CS847962ApriorityCriticalpatent/CS247631B1/en
Publication of CS796284A1publicationCriticalpatent/CS796284A1/en
Publication of CS247631B1publicationCriticalpatent/CS247631B1/en