TY JOUR TI MODELING THE OPERATION OF A RECUPERATIVE SPRING-HYDRAULIC FIFTH-WHEEL COUPLING LOCATED IN THE SEMITRAILER OF LUMBER TRUCK KW semi-trailer frame KW energy recovery KW timber tractor KW timber haulage KW simulation KW fifth-wheel coupling JO Forestry Engineering Journal AU Posmetev, V.I. AU Nikonov, V.O. AU Posmetev, V.V. AU Zelikov, V.. PY 2021 IS 11 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov