… cathode is excited by the action of light. According to the number of their electrodes they are termed diodes, triodes, … valves). The envelopes are of glass, ceramic or metal or of combinations of these materials and may incorporate means of …
… ‑ Other appliances 8509.90 ‑ Parts This heading covers a number of domestic appliances in which an electric motor is … presented with it, provided they are of a kind and number commonly used with the appliance. The weight of the …
