| 363 / | HD | ELECTRIC POWER CONVERSION SYSTEMS |
| 157 | DF | FREQUENCY CONVERSION (f1-f2) WITHOUT INTERMEDIATE CONVERSION TO D.C. {7} |
| 170 | ![]() | .~ By induction-type converter {3} |
| 171 | DF | .~.~> Transformer {1} |
| 173 | DF | .~.~> LC circuit |
| 174 | DF | .~.~> Dynamoelectric machine {2} |