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Application filed by Jaroslav Ing Kralovec, Krepelka JirifiledCriticalJaroslav Ing Kralovec
Priority to CS816109ApriorityCriticalpatent/CS231208B1/en
Publication of CS610981A1publicationCriticalpatent/CS610981A1/en
Publication of CS231208B1publicationCriticalpatent/CS231208B1/en