| 335311 |
Isolation transformers manufacturing |
| 335311 |
Lamp ballasts manufacturing |
| 335311 |
Lighting transformers manufacturing |
| 335311 |
Lighting transformers, street and airport, manufacturing |
| 335311 |
Line voltage regulators (i.e., electric transformers) manufacturing |
| 335311 |
Luminous tube transformers manufacturing |
| 335311 |
Machine tool transformers manufacturing |
| 335311 |
Power transformers, electric, manufacturing |
| 335311 |
Regulating transformers, power system-type, manufacturing |
| 335311 |
Regulators (i.e., electric transformers), feeder voltage, manufacturing |