TY JOUR TI Use of mathematical model of structure of the fiber boards of average density for justification of their processing modes KW fiber board of the average density KW cutting tool KW angular parameters KW processing mode JO Actual directions of scientific researches of the XXI century: theory and practice AU Efimova, T.V. PY 2014 IS 2 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov