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Application filed by Jerabek Frantisek, Petr Ing CeskyfiledCriticalJerabek Frantisek
Priority to CS87174ApriorityCriticalpatent/CS261711B1/en
Publication of CS17487A1publicationCriticalpatent/CS17487A1/en
Publication of CS261711B1publicationCriticalpatent/CS261711B1/en