TY JOUR TI SURFACE ROUGHNESS IMPROVEMENT OF PARTS MADE OF POLYMERIC MATERIALS OBTAINED BY MEANS OF ADDITIVE TECHNOLOGIES KW additive technologies KW 3D print KW photo-polymer KW technology KW quality KW roughness JO Bulletin of Bryansk state technical university AU Kulikov, M.Y. AU Larionov, M.A. AU Gusev, D.V. AU Shevchuk, E.O. PY 2021 IS 2021 PB Bryansk State Technical University