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Application filed by Smejkal Vilem, Zatopek FrantisekfiledCriticalSmejkal Vilem
Priority to CS888006ApriorityCriticalpatent/CS270396B1/cs
Publication of CS800688A1publicationCriticalpatent/CS800688A1/cs
Publication of CS270396B1publicationCriticalpatent/CS270396B1/cs