299 / | HD | MINING OR IN SITU DISINTEGRATION OF HARD MATERIAL |
29 | DF | HARD MATERIAL DISINTEGRATING MACHINES {17} |
64 | .~ With material-handling means {3} | |
65 | DF | .~.~> Undercutting, dislodging and conveying {1} |
67 | DF | .~.~> Material handler enters cut with cutter |
68 | DF | .~.~> Rotary impeller |