| 摘要 |
The apparatus includes a brush (3) rotated about a brush axis (2A) and having radial bristles (5), and a rigid grinding wheel (6) having an abrasive surface. A torque spring (15) energizes the grinding wheel towards the tips of the bristles, while a drive motor (11) rotates the grinding wheel, such that the wheel abrasive surface engages rear sides of the bristle tips.
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