TY CONF TI INVESTIGATION OF THE HARDNESS OF PINE WOOD DAMAGED BY A STRONG GRASSROOTS AND RIDING FIRE KW pine wood KW static end hardness KW wood tarring KW fire KW wood quality JO Ecological and resource-saving technologies in science and technology AU Snegireva, S.N. AU Platonov, A.D. AU Kantieva, E.V. PY 2022 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov