| 301 / | HD | LAND VEHICLES: WHEELS AND AXLES |
| 5.1 | DF | WHEEL {21} |
| 62 | DF | .~ Compression wheel {6} |
| 73 | DF | .~.~ Plural spoke series {1} |
| 74 | DF | .~.~.~ Hub and spoke connection {3} |
| 76 | | .~.~.~.~ Driven spoke {1} |
| 77 | DF | .~.~.~.~.~> Including socket-strengthening means |