TY CONF TI ESTIMATION OF THE EFFICIENCY OF THE LUBRICATION OF THE WORKING SURFACES OF THE SADDLE-COUPLING DEVICE OF THE FOREST TRUCK KW timber tractor KW fifth wheel KW semi-trailer KW metered feed KW lubricant KW forest road KW friction surfaces JO Modern machines, equipment and IT solutions for industrial complex: theory and practice AU Posmetev, V.I. AU Nikonov, V.O. AU Posmetev, V.V. PY 2024 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov