182 / | HD | FIRE ESCAPE, LADDER, OR SCAFFOLD |
63.1 | HAVING TRANSPOSITIONING BASE AND ERECTING MEANS {4} | |
64.1 | DF | .~> Ladder pivotably mounted on transpositioning base (e.g., on vehicle) {2} |
69.4 | DF | .~> Telescopic erecting means |
69.5 | DF | .~> Erecting means actuated by lazy tong |
69.6 | DF | .~> And platform elevatable relative to its support |