TY JOUR TI Kinematic analysis of lever systems forestry and construction manipulators KW kinematic scheme KW manipulator KW efficiency JO Actual directions of scientific researches of the XXI century: theory and practice AU Teleshev, S.. AU Moiseev, G.. AU Kolesnikov, P.. PY 2014 IS 2 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov