%0 Journal Article %T Validation of the design of milling type machines for receiving biofuel in the conditions of the woods of steppe and forest-steppe zones of the Volga region %A Fokin, S.. %K chips, milling machine type, conical mill, grinding logging residues and stumps %J Actual directions of scientific researches of the XXI century: theory and practice %D 2014 %N 2 %P 4 %I FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov