8540890091
- Thermionic, cold cathode or photocathode valves and tubes (for example, vacuum or vapour or gas filled valves and tubes, mercury arc rectifying valves and tubes, cathode ray tubes, television camera tubes)
- Other valves and tubes
- Other
- Other
- Displays in the form of a tube consisting of a glass housing mounted on a board the dimensions of which do not exceed 300 mm !x! 350 mm excluding leads. The tube contains one or more rows of characters or lines arranged in rows, each character or line consisting of fluorescent or phosphorescent elements. These elements are mounted on a metallised base which is covered with fluorescent substances or phosphorescent salts which give off light when bombarded with electrons