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Application filed by Jan Matousek, Josef Munclinger, Bohumir Pokorny, Jindrich SigmundfiledCriticalJan Matousek
Priority to CS865645ApriorityCriticalpatent/CS257053B1/en
Publication of CS564586A1publicationCriticalpatent/CS564586A1/en
Publication of CS257053B1publicationCriticalpatent/CS257053B1/en