182 / | HD | FIRE ESCAPE, LADDER, OR SCAFFOLD |
63.1 | DF | HAVING TRANSPOSITIONING BASE AND ERECTING MEANS {4} |
64.1 | DF | .~ Ladder pivotably mounted on transpositioning base (e.g., on vehicle) {2} |
68.1 | .~.~ Extension ladder pivotally mounted to be erected about a horizontal axis {3} | |
68.2 | DF | .~.~.~> Having winch means for erecting ladder |
68.3 | DF | .~.~.~> Having gear means for erecting ladder |
69.1 | DF | .~.~.~> Having lazy tong extending means {2} |