| 310 / | HD | ELECTRICAL GENERATOR OR MOTOR STRUCTURE |
| 10 | DF | DYNAMOELECTRIC {5} |
| 40 R | DF | .~ Rotary {28} |
| 179 | DF | .~.~ Windings and core structure {7} |
| 210 | DF | .~.~.~ Secondary windings or conductors {1} |
| 211 | | .~.~.~.~ Squirrel cage {1} |
| 212 | DF | .~.~.~.~.~> Inherently variable impedance (double squirrel cage) |