TY CONF TI ON DIRECTIONS FOR IMPROVING THE DESIGN OF UNMANNED AIRCRAFT VEHICLES IN APPLICATION TO FORESTRY KW unmanned aerial vehicle KW improvement KW design KW material KW application JO CIRCULAR ECONOMY FOR THE PURPOSE OF SUSTAINABLE DEVELOPMENT OF INDUSTRIES AND TERRITORIES AU Matyaev, I.M. PY 2024 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov