00615naa#a2200193#i#450# EN\INFRA-M\bibl\114274 20260307233110.6 2587-9111 20260202b2026####ek#y0engy0150####ca RU The Mechanical Engineering as the System-Forming Branch of the Tula Region Economy Journal article Moscow INFRA-M Academic Publishing LLC. 2026 4 с. Journal article local Управление экономикой. 338.24 Lomovcev D. A. Lomovcev P. D. Bobkov A. S. naukaru.ru