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Application filed by Josef Ing Holub, Ladislav Rychtera, Stanislav Ing SvorbafiledCriticalJosef Ing Holub
Priority to CS877706ApriorityCriticalpatent/CS261349B1/en
Publication of CS770687A1publicationCriticalpatent/CS770687A1/en
Publication of CS261349B1publicationCriticalpatent/CS261349B1/en