| 74 / | HD | MACHINE ELEMENT OR MECHANISM |
| 469 | DF | CONTROL LEVER AND LINKAGE SYSTEMS {8} |
| 491 | DF | .~ Hand operated {4} |
| 500.5 | DF | .~.~ Flexible transmitter (e.g., Bowden cable) {6} |
| 501.6 | ![]() | .~.~.~ And hand operator {3} |
| 502 | DF | .~.~.~.~> Slidable |
| 502.1 | DF | .~.~.~.~> For moving a mirror |
| 502.2 | DF | .~.~.~.~> Single rotatable lever (e.g., for bicycle brake or derailleur) |