| 摘要 |
An improved segmental type pulpstone (10) has circumferentially faced spiral grooves 20b (30b) (40b) in the outer abrading surface 20c (30c) (40c) thereof for collecting and allowing deeper penetration and circulation of shower water to wash away ground pulp, reduce plugging of the pores, cool and prevent overheating of the abrasive segments 20 (30) (40) the attaching bolts 18 and the resulting spalling and/or loosening of the abrasive segments from the supporting core (12) (12'). <IMAGE> |
