Mining industry : innovations and prospects for the development of materials science : 7th International Scientific Conference on Innovations and Prospects of Development of Mining Machinery and Electrical Engineering (IPDME 2019) : selected, peer reviewed papers from the 7th International Scientific Conference on Innovations and Prospects of Development of Mining Machinery and Electrical Engineering (IPDME 2019), April 24-27, 2019, Moscow, Russia - Gabov, Viktor V.; Maksarov, Vyacheslav V.; Zadkov, Denis; Martyushev, Nikita V. (Key engineering materials ;, 2020)