- Alumina porcelain insulators manufacturing [2007]
- Beryllia porcelain insulators manufacturing [2007]
- Insulators, electrical porcelain, manufacturing [2007]
- Magnets, permanent, ceramic or ferrite, manufacturing [2007]
- Porcelain parts, electrical and electronic device, molded, manufacturing [2007]
- Spark plug insulators, porcelain, manufacturing [2007]
- Steatite porcelain insulators manufacturing [2007]
- Titania porcelain insulators manufacturing [2007]
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