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Application filed by Ruzicka Jan, Vaclav Ing Netolicky, Vladislav StranskyfiledCriticalRuzicka Jan
Priority to CS844159ApriorityCriticalpatent/CS239238B1/en
Publication of CS415984A1publicationCriticalpatent/CS415984A1/en
Publication of CS239238B1publicationCriticalpatent/CS239238B1/en