TY JOUR TI Modelling of the working process of the hydraulic pulsator of forest machine manipulator KW manipulator KW hydraulic pulsator KW spool shaft KW hydraulic cylinder KW rotation frequency KW working fluid KW flow rate JO Forestry Engineering Journal AU Drapalyuk, M.V. AU Platonov, A.A. AU Popikov, P.I. PY 2025 IS 15 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov