318 / | HD | ELECTRICITY: MOTIVE POWER SYSTEMS |
445 | DF | AUTOMATIC AND/OR WITH TIME-DELAY MEANS (E.G., AUTOMATIC STARTING AND/OR STOPPING) {20} |
461 | DF | .~ Speed or rate-of-movement {3} |
463 | .~.~ Tachometer-type detector {1} | |
464 | DF | .~.~.~> Electric generator tachometer |