关于筛分的问题？？？？？？？？？？？ [复制链接]

圆孔筛与方孔筛的对应关系 表2(…ÕNÉ62+ߗbbs.3c3t.comŒ §˜“QÐú
圆孔筛孔径(mm)        对应的方孔筛孔径(mm)                (…ÕNÉ62+ߗbbs.3c3t.comŒ §˜“QÐú
      100                                        75        (…ÕNÉ62+ߗbbs.3c3t.comŒ §˜“QÐú
      80                                        63        (…ÕNÉ62+ߗbbs.3c3t.comŒ §˜“QÐú
      63(或60)                              53        (…ÕNÉ62+ߗbbs.3c3t.comŒ §˜“QÐú
      50                                        37.5        (…ÕNÉ62+ߗbbs.3c3t.comŒ §˜“QÐú
     40                                        31.5        (…ÕNÉ62+ߗbbs.3c3t.comŒ §˜“QÐú
     31.5(或30)                           26.5        (…ÕNÉ62+ߗbbs.3c3t.comŒ §˜“QÐú
     25                                       19        (…ÕNÉ62+ߗbbs.3c3t.comŒ §˜“QÐú
     20                                       16(…ÕNÉ62+ߗbbs.3c3t.comŒ §˜“QÐú
    16                                       13.2        (…ÕNÉ62+ߗbbs.3c3t.comŒ §˜“QÐú
    10                                       9.5(…ÕNÉ62+ߗbbs.3c3t.comŒ §˜“QÐú
    5                                         4.75(…ÕNÉ62+ߗbbs.3c3t.comŒ §˜“QÐú
   2.5                                       2.36(…ÕNÉ62+ߗbbs.3c3t.comŒ §˜“QÐú
   1.25                                     1.18(…ÕNÉ62+ߗbbs.3c3t.comŒ §˜“QÐú
   0.63                                     0.6(…ÕNÉ62+ߗbbs.3c3t.comŒ §˜“QÐú
   0.315                                   0.3(…ÕNÉ62+ߗbbs.3c3t.comŒ §˜“QÐú
   0.16                                     0.15(…ÕNÉ62+ߗbbs.3c3t.comŒ §˜“QÐú
   0.075                                   0.075(…ÕNÉ62+ߗbbs.3c3t.comŒ §˜“QÐú
　        　(…ÕNÉ62+ߗbbs.3c3t.comŒ §˜“QÐú
注：圆孔筛系列中小于1.25mm的本来就是方孔筛。(…ÕNÉ62+ߗbbs.3c3t.comŒ §˜“QÐú
摘录自《JTJ058-2000公路工程集料试验规程》，已作废，因为现在国标用石筛子也已改为方孔，因此现在有效的《公路工程集料试验规程(JTG E42-2005)》已取消这个表。(…ÕNÉ62+ߗbbs.3c3t.comŒ §˜“QÐú