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Application filed by П.И. Астраханцев, И.Ф. СукневичfiledCriticalП.И. Астраханцев
Priority to SU151085ApriorityCriticalpatent/SU40984A1/ru
Application grantedgrantedCritical
Publication of SU40984A1publicationCriticalpatent/SU40984A1/ru