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Application filed by Zdenek Ing Raif, Jaroslav Dr Vacha, Ludvik Bechtold, Frantisek KrsnakfiledCriticalZdenek Ing Raif
Priority to CS842218ApriorityCriticalpatent/CS238947B1/en
Publication of CS221884A1publicationCriticalpatent/CS221884A1/en
Publication of CS238947B1publicationCriticalpatent/CS238947B1/en