TY JOUR TI DETERMINATION OF THE COEFFICIENT OF EFFICIENCY OF BRIGHTENING ADDITIVES KW bright nickel plating KW brightening agent KW the coefficient of efficiency. JO Modern Technologies and Scientific and Technological Progress AU Sosnovskaya, N.G. AU Mihaylova, A.S. AU Cyrenova, O.A. PY 2020 IS 2018 PB Federal State Funded Educational Establishment of Higher Education «Angarsk State Technical University»