74 / | HD | MACHINE ELEMENT OR MECHANISM |
* | DD | MECHANICAL MOVEMENTS {15} |
89 | DF | .~ Reciprocating or oscillating to or from alternating rotary {6} |
89.1 | DF | .~.~ Including inertia device {1} |
89.11 | DF | .~.~.~ With rack and pinion {1} |
89.12 | .~.~.~.~ Rectilinear rack |