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Application filed by И.В. Вирозуб, С.И. ЦепелевичfiledCriticalИ.В. Вирозуб
Priority to SU6629ApriorityCriticalpatent/SU76396A1/en
Application grantedgrantedCritical
Publication of SU76396A1publicationCriticalpatent/SU76396A1/en