| 摘要 |
An abrasion apparatus having a freely rotatable platen, an application block to which a workpiece is applied, and at least one pressing plate to press the workpiece on the platen with the application block being located therebetween. A working face of the platen is corrected by providing the pressing plate with a retaining ring to which the application block is fitted, which also serves as a dresser, and by pressing the retaining ring on the platen when the application block has been removed.
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