D.V. Bokhovkin1, Yu.Yu. Korobkov2, O.A. Yangovatova3, P.A. Karpenko4, B.V. Khlopov5

1-5 JSC “CNIRTI named after academician A.I. Berg” (Moscow, Russia)

1 bokhovkin@yandex.ru; 2 jura9891@gmail.com; 3yangovatova@mail.ru, 4pakarpenko@mail.ru