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Application filed by Jiri Cermak, Bohuslav NovotnyfiledCriticalJiri Cermak
Priority to CS827068ApriorityCriticalpatent/CS231329B1/en
Publication of CS706882A1publicationCriticalpatent/CS706882A1/en
Publication of CS231329B1publicationCriticalpatent/CS231329B1/en