Heading
8540
Thermionic, cold cathode or photo-cathode valves and tubes (e.g. vacuum, vapour, gas filled valves and tubes, mercury arc rectifying valves and tubes, cathode-ray and television camera tubes)
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Subheadings
854011Tubes; cathode-ray television picture tubes, including video monitor cathode-ray tubes, colour854012Tubes; cathode-ray television picture tubes, including video monitor cathode-ray tubes, monochrome854020Tubes; television camera tubes, image converters and intensifiers, other photo-cathode tubes854040Tubes; data/graphic display tubes, monochrome; data/graphic display tubes, colour, with a phosphor dot screen pitch smaller than 0.4mm854060Tubes; cathode ray, n.e.c. in heading no. 8540854071Tubes; microwave, magnetrons, excluding grid-controlled tubes854079Tubes; microwave (for example klystrons, travelling wave tubes, carlinotrons), excluding magnetrons and grid-controlled tubes854081Valves and tubes; receiver or amplifier854089Valves and tubes; n.e.c. in heading no. 8540854091Tubes; parts of cathode-ray tubes854099Valves and tubes; parts of the valves and tubes of heading no. 8540, excluding parts of cathode-ray tubes