TY JOUR TI Study of the kinematic and dynamic parameters of the skid device with energy-saving hydraulic drive KW timber skidding KW wheel tractor KW power unit KW accumulator KW dynamic load JO Actual directions of scientific researches of the XXI century: theory and practice AU Popikov, V.P. AU Kanishchev, D.A. PY 2015 IS 3 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov