筛孔尺寸/mm | 19 | 16 | 13.2 | 9.5 | 4.75 | 2.36 | 1.18 | 0.6 | 0.3 | 0.15 | 0.075 |
级配上限 | 100 | 90 | 60 | 30 | 24 | 20 | 15 | 15 | 12 | 8 | 6 |
级配下限 | 90 | 60 | 30 | 20 | 7 | 5 | 5 | 4 | 3 | 3 | 1 |