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Application filed by Zdenek Ing Raif, Jaroslav Dr Vacha, Ludvik Bechtold, Frantisek KrsnakfiledCriticalZdenek Ing Raif
Priority to CS842212ApriorityCriticalpatent/CS239964B1/en
Publication of CS221284A1publicationCriticalpatent/CS221284A1/en
Publication of CS239964B1publicationCriticalpatent/CS239964B1/en