TY JOUR TI PECULIARITIES IN TUNGSTEN ALLOY PARTS PROCESSING FOR OIL-GAS INDUSTRY KW alloy KW machining KW turning KW electro-erosion treatment KW cutting modes KW electrode KW tungsten alloy KW durability JO Bulletin of Bryansk state technical university AU Terehov, M.V. AU Sevost'yanov, D.M. AU Filippova, L.B. PY 2021 IS 2021 PB Bryansk State Technical University