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Application filed by Bohumir Kotrc, Lubomir Sejnost, Jiri Ing KrejcifiledCriticalBohumir Kotrc
Priority to CS874881ApriorityCriticalpatent/CS263313B1/en
Publication of CS488187A1publicationCriticalpatent/CS488187A1/en
Publication of CS263313B1publicationCriticalpatent/CS263313B1/en