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Application filed by Pavol Ing Petrik, Jozef PacalafiledCriticalPavol Ing Petrik
Priority to CS89828ApriorityCriticalpatent/CS270896B1/en
Publication of CS82889A1publicationCriticalpatent/CS82889A1/en
Publication of CS270896B1publicationCriticalpatent/CS270896B1/en