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Application filed by Н.С. Коварский, П.Ф. ЛодышкинfiledCriticalН.С. Коварский
Priority to SU118060ApriorityCriticalpatent/SU37225A1/en
Application grantedgrantedCritical
Publication of SU37225A1publicationCriticalpatent/SU37225A1/en