TY JOUR TI Possibility of Extending Tramway Track Service Life in St. Petersburg KW Tramway track KW hardness KW grooved rail KW service life KW structure JO Bulletin of scientific research results AU Basovskiy, D.A. AU Vostrikov, O.V. AU Panchenko, N.M. PY 2023 IS 2023 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"