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Application filed by Zdenek Ing Raif, Jaroslav Dr Vacha, Ludvik Bechtold, Frantisek KrsnakfiledCriticalZdenek Ing Raif
Priority to CS842217ApriorityCriticalpatent/CS238546B1/en
Publication of CS221784A1publicationCriticalpatent/CS221784A1/en
Publication of CS238546B1publicationCriticalpatent/CS238546B1/en