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Heading 8540 · Section XVI

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)

Subheadings 11

Source: Harmonized System 2022 edition (World Customs Organization), from the UN Comtrade classification list.