| 180 / | HD | MOTOR VEHICLES | 
| 170 | DF | WITH MEANS RESPONSIVE TO SPEED OF VEHICLE FOR MAINTAINING SPEED AT, OR PREVENTING IT FROM EXCEEDING, A PARTICULAR VALUE {4} | 
| 175 | DF | .~ Including fluid pressure actuated servomechanism {2} | 
| 177 |  | .~.~ And one or more electrical components for establishing or regulating input pressure |