V.M. Bukhshtaber, V.B. Bychkov, A.M. Enyakov, V.N. Nekrasov, V.I. Pustovoyt, U.F. Feyzkhanov FSUE “VNIIFTRI”, Mendeleevo, Moscow region, Russiabychkov@vniiftri.ru,enyakov@vniiftri.ru,nvn@vniiftri.ru,pustovoit@vniiftri.ru Al’manac of Modern Metrology № 2 (26) 2021, pages 158–170 Full texts of articles are available only in Russian in printed issues of the magazine.