TY JOUR TI SOLUTION OF PROBLEMS OF CURVED SURFACE APPROXIMATION BY LAYERS WITH CONSTANT AND VARIABLE CROSS-SECTIONS AT SHAPING WITH ADDITIVE METHODS KW additive technologies KW layer-by-layer synthesis KW shaping KW error JO Bulletin of Bryansk state technical university AU Grechuhin, A.N. AU Kuc, V.V. AU Razumov, M.S. PY 2019 IS 2019 PB Bryansk State Technical University