The paper presents some results of the complex processing of metal surfaces made of steel with a carbon content ≤ 0.35%. The complex processing was performed in different consecutiveness: ESA + CHTT and CHTT + ESA. Electrodes ...

În această lucrare sînt descrise mecanismele decisive care iniţiază formarea neomogenităţilor ionosferice înainte şi după declanşarea cutremurului şi sînt prezentate date experimentale, obţinute prin sondare verticală a ...

This article presents the ionospheric oblique sounding system which is used to investigate the state of the ionosphere and determine the propagation conditions of radio waves in the frequency range 1 30 MHz