TY JOUR TI IMPROVING THE QUALITY OF IMPREGNATION OF BIRCH WOOD IN THE PRODUCTION OF SLEEPERS KW impregnation KW hot-cold bath method KW amount of absorbed solution KW birch KW modified wood KW cooling KW depth of impregnation JO Forestry Engineering Journal AU Snegireva, S.N. AU Platonov, A.D. AU Parinov, D.A. AU Medvedev, I.N. AU Kiseleva, A.V. PY 2020 IS 9 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov