TY JOUR TI Improving working equipment hydraulic excavator KW research KW characteristics KW hydraulic excavator KW load lifting mechanism KW operational equipment KW dynamic load JO Actual directions of scientific researches of the XXI century: theory and practice AU Makeev, V.. PY 2014 IS 2 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov