The Tunnel: Season 1 review. British detective Karl Roebuck and his French counterpart Elise Wassermann are reluctantly thrown together to investigate a dead body found at the mid-point of the Channel Tunnel.
corona means crown but that is some mexican modism I don't know what does that mean?
Corona ring. A corona ring, also called an anti-corona ring, is a toroid of conductive material, usually metal, which is attached to a terminal of high voltage equipment. The role of the corona ring is to distribute the electric field gradient and lower its maximum values below the corona threshold, preventing corona discharge.