Industry
Appliances, Electrical, and Electronics Manufacturing, Transformers and auto-transformers, water-cooled, Electrical equipment. Nuclear equipment, Electrical, Electronics & Optical, Electric regulators, Transformers and auto-transformers, by use, Transformers and auto-transformers, Electromechanical converters, Transformers and auto-transformers, up to 1 kVA, Transformers, phase converting (Scott, Leblanc and Court)