| 摘要 |
An abrasive consisting of grains containing 15-40 per cent abrasive particles with a size below 60 mesh, 2-75 per cent pore-forming particles (with a size of 325-50 mesh) and 10-50 per cent resin binder, all in per cent by volume. Each grain contains at least 10 abrasive particles and at least 10 pore-forming particles. |
