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Publication date
Application filed by Broz Vaclav, Oldrich Kubat, Milos OpocenskyfiledCriticalBroz Vaclav
Priority to CS84324ApriorityCriticalpatent/CS242660B1/en
Publication of CS32484A1publicationCriticalpatent/CS32484A1/en
Publication of CS242660B1publicationCriticalpatent/CS242660B1/en