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- Manufacture of other electronic components n.e.c (31)
- Manufacture of thermion, cold cathode or photo-cathode valves and tubes (e.g. TV picture tubes, TV camera tubes, image converters and intensifiers, microwave tubes, receiver or amplifier valves or tubes etc.) (8)
- Manufacture of electrical capacitors (or condensers); fixed, variable or adjustable. (3)
- Manufacture of diodes, transistors and similar semi-conductor devices, photosensitive semi-conductor devices, including photo-voltaic cells; mounted piezoelectric crystals (2)
- Manufacture of part and accessories for electronic valves and tubes and other electronic components (2)