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Application filed by И. А. Богуславский , М. Я. МаркеловаfiledCriticalИ. А. Богуславский , М. Я. Маркелова
Priority to SU1803182ApriorityCriticalpatent/SU429037A1/ru
Application grantedgrantedCritical
Publication of SU429037A1publicationCriticalpatent/SU429037A1/ru