TY JOUR TI Quality systems engineering hydraulic drive technological machines due to their calculations based on volumetric stiffness KW hydraulic drive KW hydraulic system KW volumetric stiffness KW coefficient of volume stiffness. JO Actual directions of scientific researches of the XXI century: theory and practice AU Rybak , A.. PY 2015 IS 3 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov