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Application filed by Josef Ing Cernik, Machacek MilanfiledCriticalJosef Ing Cernik
Priority to CS822487ApriorityCriticalpatent/CS231066B1/en
Publication of CS248782A1publicationCriticalpatent/CS248782A1/en
Publication of CS231066B1publicationCriticalpatent/CS231066B1/en