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Application filed by Josef Ing Materanka, Karel Hruska, Frantisek BreckafiledCriticalJosef Ing Materanka
Priority to CS87771ApriorityCriticalpatent/CS265113B1/en
Publication of CS77187A1publicationCriticalpatent/CS77187A1/en
Publication of CS265113B1publicationCriticalpatent/CS265113B1/en