TY JOUR TI Assessment of optimum size of hook loading of the mashinotraktorny unit KW caterpillars KW slipping KW hook load KW machine KW ground JO Actual directions of scientific researches of the XXI century: theory and practice AU Klubnichkin, E.E. AU Klubnichkin, V.E. AU Shnyakov, A.. PY 2014 IS 2 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov