TY CONF TI STRUCTURAL AND TECHNOLOGICAL FEATURES OF BRAZIL'S RAILWAY INFRASTRUCTURE FOR TRANSPORTING IRON ORE FROM MINING SITES TO PORTS KW heavy traffic KW Brazil KW Carajas KW iron ore KW S11D JO INTERNATIONAL SCIENTIFIC AND PRACTICAL CONFERENCE "MANAGEMENT OF OPERATIONAL WORK IN TRANSPORT" (UERT-2022) AU Chernyak, A.R. PY 2022 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"