%0 Journal Article %T Twin-lines of raft units %A Posypanov, S.V. %A Kudryavtsev, G.. %K round wood, timber rafting, rafting units lines, small and middle-level rivers. %J Actual directions of scientific researches of the XXI century: theory and practice %D 2015 %N 3 %P 3 %I FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov