| 241 / | HD | SOLID MATERIAL COMMINUTION OR DISINTEGRATION | 
| * | DD | APPARATUS {41} | 
| 291 | DF | .~ Comminuting elements {7} | 
| 293 | DF | .~.~ Cylindrical or frusto-conical (i.e., peripheral comminuting face) {1} | 
| 294 | DF | .~.~.~ Sectional or separable surface element {1} | 
| 295 |  | .~.~.~.~ Annular sections |