74 / | HD | MACHINE ELEMENT OR MECHANISM |
469 | DF | CONTROL LEVER AND LINKAGE SYSTEMS {8} |
* | DD | .~ Elements {8} |
543 | DF | .~.~ Handles {6} |
551.1 | DF | .~.~.~ Handle bars {4} |
551.3 | .~.~.~.~ Folding or adjustable {2} | |
551.4 | DF | .~.~.~.~.~> Sectional {1} |
551.6 | DF | .~.~.~.~.~> Continuous {1} |