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Application filed by Ladislav Lehr, Stanislav Ing MachovskyfiledCriticalLadislav Lehr
Priority to CS823433ApriorityCriticalpatent/CS231020B1/en
Publication of CS343382A1publicationCriticalpatent/CS343382A1/en
Publication of CS231020B1publicationCriticalpatent/CS231020B1/en