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Publication of SU6976A1publicationCriticalpatent/SU6976A1/ru
Application filed by А.И. КузнецовfiledCriticalА.И. Кузнецов
Priority to SU77354ApriorityCriticalpatent/SU29251A1/ru
Application grantedgrantedCritical
Publication of SU29251A1publicationCriticalpatent/SU29251A1/ru