241 / | HD | SOLID MATERIAL COMMINUTION OR DISINTEGRATION |
* | DD | APPARATUS {41} |
107 | DF | .~ Plural rotary or oscillatory surfaces cooperate with common surface (e.g., chasing mills) {9} |
123 | DF | .~.~ Planetary movement of plural surfaces {4} |
127 | DF | .~.~.~ Forcible away from common surface {4} |
131 | .~.~.~.~ Centrifugally urged toward contact |