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Publication date
Application filed by Karel Slama, Miroslav Ing BrabenecfiledCriticalKarel Slama
Priority to CS86310ApriorityCriticalpatent/CS253236B1/en
Publication of CS31086A1publicationCriticalpatent/CS31086A1/en
Publication of CS253236B1publicationCriticalpatent/CS253236B1/en