N. A. Markov
Vladimir State University named after A.G. and N.G. Stoletovs
Russian Federation

Nikita A. Markov, Assistant of the Heat and Gas Supply, Ventilation, and Hydraulics Department, 

87, Gor'kogo str., Vladimir 600000.

S. V. Ugorova
Vladimir State University named after A.G. and N.G. Stoletovs
Russian Federation

Svetlana V. Ugorova, Cand. of Sci. (Engineering), Associate Professor, Head of the Heat and Gas Supply, Ventilation and Hydraulics Department, 

87, Gor'kogo str., Vladimir 600000.