| 74 / | HD | MACHINE ELEMENT OR MECHANISM |
| 469 | DF | CONTROL LEVER AND LINKAGE SYSTEMS {8} |
| 479.01 | DF | .~ Multiple controlling elements for single controlled element {8} |
| 484 R | DF | .~.~ Steering and controls assemblies {3} |
| 486 | DF | .~.~.~ Reciprocating control elements {2} |
| 487 | | .~.~.~.~ Flexible |