ICNEA 3971—Electronic vacuum device manufacturing

Where 3971 sits

1. C Manufacturing industry
2. 39 Computer, communications and other electronic equipment manufacturing industry
3. 397 Electronic device manufacturing
4. 3971 Electronic vacuum device manufacturing

What 3971 includes

• Including manufacturing activities for the following electronic vacuum devices：
• Tube
• Receiving amplifier tube: direct heating type small tube, side heating type small tube, frame grid small tube, ultra-small tube, eight-pin tube, thumb tube, other receiving amplifier tube
• Microwave tube: magnetron, klystron, microwave gas discharge tube, traveling wave tube, return wave tube, noise tube, lighthouse tube, antenna switch tube, other microwave tube
• Transmitting tube: small and medium-power transmitting tube, high-power transmitting tube, modulation tube, other transmitting tube
• Stabilizer tube: stabilizer tube, stabilizer tube, other stabilizer tube
• Ion tubes: thyristor, discharge tube, ion counting tube, cold cathode trigger tube, ultraviolet light sensitive tube, other ion tubes
• Electron beam tube
• Picture tube: color picture tube, black and white picture tube, other picture tube
• Display tube: color data/graphics display tube, black and white data/graphics display tube, radar display tube, other display tube
• Projection tube, monitoring tube, oscilloscope tube, storage tube, pulse forming tube, flying point scanning tube
• Other electron beam tubes
• Ray counting tube
• Vacuum switch tube: high and medium voltage vacuum switch tube (3～36kV), low voltage vacuum switch tube (below 3kV), other vacuum switch tube
• Vacuum electronic device parts: picture tube parts (color picture tube, electronic gun parts, color picture tube glass shell, shade mask for color picture tube), electronic tube parts, other vacuum electronic device parts
• Other vacuum electronic devices: vacuum fluorescent display device (VFD), vacuum tube, frequency standard tube, other vacuum electronic devices not specified
• The following product manufacturing activities are included in this category
• Special purpose vacuum devices
• Refers to the manufacture of electronic thermion tubes, cold cathode tubes or photocathodes, and other vacuum electronic devices, as well as electronic tube parts.

3971 in other systems