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Application filed by Kupka Frantisek, Vilem Ing SlechanfiledCriticalKupka Frantisek
Priority to CS866185ApriorityCriticalpatent/CS260119B1/en
Publication of CS618586A1publicationCriticalpatent/CS618586A1/en
Publication of CS260119B1publicationCriticalpatent/CS260119B1/en