318 / | HD | ELECTRICITY: MOTIVE POWER SYSTEMS |
560 | DF | POSITIONAL SERVO SYSTEMS (E.G., SERVOMECHANISMS) {23} |
580 | .~ Vehicular guidance systems with single axis control {8} | |
581 | DF | .~.~> Radio-controlled |
582 | DF | .~.~> Celestial navigation |
583 | DF | .~.~> Landing systems |
584 | DF | .~.~> Altitude or pitch control |
585 | DF | .~.~> Roll control |
586 | DF | .~.~> Yaw control |
587 | DF | .~.~> Land vehicles |
588 | DF | .~.~> Marine vehicles {1} |