Russian pronunciation lookup
предназначенный
Said in one Russian podcast line.
предназначенный для показывания быстрых колебаний в атмосферном электричестве.
intended to show rapid fluctuations in atmospheric electricity.

Т-МедиаБез радио никак!
The shows belong to their publishers, and each line plays from the publisher’s own file. Translations are machine-made. Russian books and courses on Amazon (affiliate link).