| 318 / | HD | ELECTRICITY: MOTIVE POWER SYSTEMS |
| 34 | DF | PLURAL, DIVERSE OR DIVERSELY CONTROLLED ELECTRIC MOTORS {22} |
| 53 | DF | .~ Plural, diverse motor controls {4} |
| 54 | DF | .~.~ Motor-reversing {3} |
| 55 | DF | .~.~.~ With running-speed control {1} |
| 56 | ![]() | .~.~.~.~ And braking |