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Application filed by Pavel Ing Gruener, Dvorsky Drahomir, Karel CerovskyfiledCriticalPavel Ing Gruener
Priority to CS862378ApriorityCriticalpatent/CS255923B1/en
Publication of CS237886A1publicationCriticalpatent/CS237886A1/en
Publication of CS255923B1publicationCriticalpatent/CS255923B1/en