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Application filed by С.М, Шапиро, И.П. Творогов, М.И. ХотинскаfiledCriticalС.М
Priority to SU1286221ApriorityCriticalpatent/SU276089A1/ru
Application grantedgrantedCritical
Publication of SU276089A1publicationCriticalpatent/SU276089A1/ru