| 摘要 |
A grinding disc structure including an integrally formed main disc adapted to a dust-sucking cover body of a grinder. The main disc has multiple through holes nearly in parallel to an axis of the main disc. The main disc is further formed with multiple internal passages which are horizontally formed in the main disc corresponding to the through holes and nearly perpendicular to the axis of the main disc. The passages are tangential to the through holes. Two ends of each passage respectively communicate with the through hole and outer side around the main disc. The main disc has a complete bottom face to which a grinding layer can be fully adhered. |
