in respect of heavy oils other than gas oils and fuel oils falling within heading ex2710 only, treatment by means of a high-frequency electrical brush-discharge.
maidir le holaí troma seachas olaí gáis agus olaí breosla a thagann faoi cheannteideal ex2710 amháin, cóireáil trí bhíthin scuab-dhíluchtú leictreach ardmhinicíochta.