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×|jD0d>Áÿµbbs.3c3t.comV0Ž=6tílL›
圆孔筛孔径(mm)        对应的方孔筛孔径(mm)                ×|jD0d>Áÿµbbs.3c3t.comV0Ž=6tílL›
      100                                        75        ×|jD0d>Áÿµbbs.3c3t.comV0Ž=6tílL›
      80                                        63        ×|jD0d>Áÿµbbs.3c3t.comV0Ž=6tílL›
      63(或60)                              53        ×|jD0d>Áÿµbbs.3c3t.comV0Ž=6tílL›
      50                                        37.5        ×|jD0d>Áÿµbbs.3c3t.comV0Ž=6tílL›
     40                                        31.5        ×|jD0d>Áÿµbbs.3c3t.comV0Ž=6tílL›
     31.5(或30)                           26.5        ×|jD0d>Áÿµbbs.3c3t.comV0Ž=6tílL›
     25                                       19        ×|jD0d>Áÿµbbs.3c3t.comV0Ž=6tílL›
     20                                       16×|jD0d>Áÿµbbs.3c3t.comV0Ž=6tílL›
    16                                       13.2        ×|jD0d>Áÿµbbs.3c3t.comV0Ž=6tílL›
    10                                       9.5×|jD0d>Áÿµbbs.3c3t.comV0Ž=6tílL›
    5                                         4.75×|jD0d>Áÿµbbs.3c3t.comV0Ž=6tílL›
   2.5                                       2.36×|jD0d>Áÿµbbs.3c3t.comV0Ž=6tílL›
   1.25                                     1.18×|jD0d>Áÿµbbs.3c3t.comV0Ž=6tílL›
   0.63                                     0.6×|jD0d>Áÿµbbs.3c3t.comV0Ž=6tílL›
   0.315                                   0.3×|jD0d>Áÿµbbs.3c3t.comV0Ž=6tílL›
   0.16                                     0.15×|jD0d>Áÿµbbs.3c3t.comV0Ž=6tílL›
   0.075                                   0.075×|jD0d>Áÿµbbs.3c3t.comV0Ž=6tílL›
　        　×|jD0d>Áÿµbbs.3c3t.comV0Ž=6tílL›
注：圆孔筛系列中小于1.25mm的本来就是方孔筛。×|jD0d>Áÿµbbs.3c3t.comV0Ž=6tílL›
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。×|jD0d>Áÿµbbs.3c3t.comV0Ž=6tílL›