318 / | HD | ELECTRICITY: MOTIVE POWER SYSTEMS |
34 | DF | PLURAL, DIVERSE OR DIVERSELY CONTROLLED ELECTRIC MOTORS {22} |
53 | DF | .~ Plural, diverse motor controls {4} |
59 | DF | .~.~ Running-speed control {3} |
62 | .~.~.~ And automatic starting and/or stopping and/or with time delay |