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I.V. Ryabov, N.V. Degtyarev, E.S. Klyuzhev, I.V. Strelnikov
Volga State University of Technology (Yoshkar-Ola, Russia)
Volga State University of Technology (Yoshkar-Ola, Republic of Mari El, Russia)
I.V. Ryabov1, T.S. Bukanova2, N.V. Degtyarev3
1-3 Volga State University of Technology (Yoshkar-Ola, Russia)
1 ryabov22@mail.ru