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Application filed by А.И. ЛяшенкоfiledCriticalА.И. Ляшенко
Priority to SU2196429/25;2519150/25ApriorityCriticalpatent/SU646729A1/en
Application grantedgrantedCritical
Publication of SU646729A1publicationCriticalpatent/SU646729A1/en