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Application filed by Bohumil Ing Sara, Vaclav Babovak, Zbynek SarafiledCriticalBohumil Ing Sara
Priority to CS787787ApriorityCriticalpatent/CS241251B1/en
Publication of CS778778A1publicationCriticalpatent/CS778778A1/en
Publication of CS241251B1publicationCriticalpatent/CS241251B1/en