TY JOUR TI SWIVEL JOINT WEAR-RESISTANCE INCREASE OF PROCESSING MACHINE MANIPULATORS KW working capacity KW swivels KW wear-resistance KW life KW tribotechnical properties KW roughness KW units KW materials JO Bulletin of Bryansk state technical university AU Kapustin, V.V. AU Pamfilov, E.A. AU Sheveleva, E.V. AU Pilyushina, G.A. PY 2021 IS 2021 PB Bryansk State Technical University