TY JOUR TI WEAR FEATURES OF THE NOZZLE FOCUSING TUBE OF THE HYDROABRASIVE INSTALLATION WHEN INTRODUCING SURFACTANTS KW hydroabrasive cutting KW focusing tube KW nozzle KW jet KW wear KW surfactants JO Transport engineering AU Kozhus, O.G. AU Barsukov, G.V. AU Nozdrin, E.D. AU Tinyakova, E.A. AU Zenkina, P.N. PY 2026 IS 2026 PB Bryansk State Technical University