| 299 / | HD | MINING OR IN SITU DISINTEGRATION OF HARD MATERIAL |
| 29 | DF | HARD MATERIAL DISINTEGRATING MACHINES {17} |
| 42 | DF | .~ Sidewall-working (e.g., drum-type cutter) {4} |
| 53 | DF | .~.~ Vertical cutter tooth orbit {1} |
| 54 | ![]() | .~.~.~ Cutter bodily shiftable horizontally |