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Application filed by Ф.С. ЯковлевfiledCriticalФ.С. Яковлев
Priority to SU51755ApriorityCriticalpatent/SU16012A1/en
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Тип. Гидрогр. Упр. Управл. В.-М. Сил РККА. Яенннград, здание Гл. Адниралтейства.Type of. Hydro Exercise Manage V.-M. Forces of the Red Army. Yanngrad, building Ch. Adneyralteystva.