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Publication date
Application filed by Jaroslav Kocour, Karel ZabkafiledCriticalJaroslav Kocour
Priority to CS87568ApriorityCriticalpatent/CS260621B1/en
Publication of CS56887A1publicationCriticalpatent/CS56887A1/en
Publication of CS260621B1publicationCriticalpatent/CS260621B1/en