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Application filed by Mendel M Sapievskij, Sergej V SelskijfiledCriticalMendel M Sapievskij
Priority to CS827123ApriorityCriticalpatent/CS247124B1/en
Publication of CS712382A1publicationCriticalpatent/CS712382A1/en
Publication of CS247124B1publicationCriticalpatent/CS247124B1/en