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Application filed by Petr Ing Smolek, Josef Ing Stichauer, Cernohorsky VladimirfiledCriticalPetr Ing Smolek
Priority to CS844998ApriorityCriticalpatent/CS239772B1/en
Publication of CS499884A1publicationCriticalpatent/CS499884A1/en
Publication of CS239772B1publicationCriticalpatent/CS239772B1/en