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Application grantedgrantedCritical
Publication of SU5614A1publicationCriticalpatent/SU5614A1/ru
Application filed by В.Е. НеймаркfiledCriticalВ.Е. Неймарк
Priority to SU6428ApriorityCriticalpatent/SU75222A2/ru
Publication of SU75222A2publicationCriticalpatent/SU75222A2/ru