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Application filed by Б.В. ФатеевfiledCriticalБ.В. Фатеев
Priority to SU2572149/06ApriorityCriticalpatent/SU666935A1/en
Application grantedgrantedCritical
Publication of RU666935CpublicationCriticalpatent/RU666935C/en
Publication of SU666935A1publicationCriticalpatent/SU666935A1/en