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Filing date
Publication date
Application filed by А. Л. МельниковfiledCriticalА. Л. Мельников
Priority to SU1795406ApriorityCriticalpatent/SU434053A2/en
Application grantedgrantedCritical
Publication of SU434053A1publicationCriticalpatent/SU434053A1/en
Publication of SU434053A2publicationCriticalpatent/SU434053A2/en