| 74 / | HD | MACHINE ELEMENT OR MECHANISM |
| 469 | DF | CONTROL LEVER AND LINKAGE SYSTEMS {8} |
| 471 R | DF | .~ Multiple controlled elements {3} |
| 473.1 | DF | .~.~ Transmission control {11} |
| 473.16 | ![]() | .~.~.~ Foot operated {1} |
| 473.17 | DF | .~.~.~.~> Multiple foot-operated controls |