180 / | HD | MOTOR VEHICLES |
7.1 | DF | SPECIAL DRIVING DEVICE {6} |
9 | DF | .~ Portable track {2} |
9.1 | DF | .~.~ Endless, flexible {12} |
9.5 | DF | .~.~.~ Track support mounted for vertical movement {2} |
9.54 | DF | .~.~.~.~ With spring {2} |
9.58 | .~.~.~.~.~ Leaf or torsion spring {1} | |
9.6 | DF | .~.~.~.~.~.~> Transversely extending |