TY JOUR TI Dimensioning of a lines composed of the flat timber rafting units when moving on curved sections of rivers KW flat rafting unit KW distance KW bending JO Actual directions of scientific researches of the XXI century: theory and practice AU Shtaborov, D.. AU Perfilev, P.. PY 2014 IS 2 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov