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Publication date
Application filed by Josef Stary, Zdenek Svec, Vaclav DivisfiledCriticalJosef Stary
Priority to CS875233ApriorityCriticalpatent/CS263855B1/en
Publication of CS523387A1publicationCriticalpatent/CS523387A1/en
Publication of CS263855B1publicationCriticalpatent/CS263855B1/en