299 / | HD | MINING OR IN SITU DISINTEGRATION OF HARD MATERIAL |
29 | DF | HARD MATERIAL DISINTEGRATING MACHINES {17} |
36.1 | DF | .~ Floor-working {3} |
37.1 | ![]() | .~.~ Reciprocating or oscillating cutter {2} |
37.2 | DF | .~.~.~> Resonant vibrator driven |
38.1 | DF | .~.~.~> Narrow, channel-forming type |