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Application filed by Arnost Schlemmer, Hudec Frantisek, Josef Chvatal, Vladimir NaprstekfiledCriticalArnost Schlemmer
Priority to CS861929ApriorityCriticalpatent/CS256613B1/cs
Publication of CS192986A1publicationCriticalpatent/CS192986A1/cs
Publication of CS256613B1publicationCriticalpatent/CS256613B1/cs