PENNSYLVANIA CRUSHER CORP. Primary Class: 241/194. Other Classes: 241/195, 241/300 . International Classes: B02C13/04; B02C13/28; (IPC1-7): B02C13/04; B02C13/28 . Field of Search: ... When the rotary crusher is rotating clockwise, as just described, the rearmost hammer 23 is functionally idle, at least so far as striking the coal or other ...
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