关于筛分的问题？？？？？？？？？？？ [复制链接]

圆孔筛与方孔筛的对应关系 表22y­!Î.„1ךbbs.3c3t.comOÚ<¯ª†hX$f
圆孔筛孔径(mm)        对应的方孔筛孔径(mm)                2y­!Î.„1ךbbs.3c3t.comOÚ<¯ª†hX$f
      100                                        75        2y­!Î.„1ךbbs.3c3t.comOÚ<¯ª†hX$f
      80                                        63        2y­!Î.„1ךbbs.3c3t.comOÚ<¯ª†hX$f
      63(或60)                              53        2y­!Î.„1ךbbs.3c3t.comOÚ<¯ª†hX$f
      50                                        37.5        2y­!Î.„1ךbbs.3c3t.comOÚ<¯ª†hX$f
     40                                        31.5        2y­!Î.„1ךbbs.3c3t.comOÚ<¯ª†hX$f
     31.5(或30)                           26.5        2y­!Î.„1ךbbs.3c3t.comOÚ<¯ª†hX$f
     25                                       19        2y­!Î.„1ךbbs.3c3t.comOÚ<¯ª†hX$f
     20                                       162y­!Î.„1ךbbs.3c3t.comOÚ<¯ª†hX$f
    16                                       13.2        2y­!Î.„1ךbbs.3c3t.comOÚ<¯ª†hX$f
    10                                       9.52y­!Î.„1ךbbs.3c3t.comOÚ<¯ª†hX$f
    5                                         4.752y­!Î.„1ךbbs.3c3t.comOÚ<¯ª†hX$f
   2.5                                       2.362y­!Î.„1ךbbs.3c3t.comOÚ<¯ª†hX$f
   1.25                                     1.182y­!Î.„1ךbbs.3c3t.comOÚ<¯ª†hX$f
   0.63                                     0.62y­!Î.„1ךbbs.3c3t.comOÚ<¯ª†hX$f
   0.315                                   0.32y­!Î.„1ךbbs.3c3t.comOÚ<¯ª†hX$f
   0.16                                     0.152y­!Î.„1ךbbs.3c3t.comOÚ<¯ª†hX$f
   0.075                                   0.0752y­!Î.„1ךbbs.3c3t.comOÚ<¯ª†hX$f
　        　2y­!Î.„1ךbbs.3c3t.comOÚ<¯ª†hX$f
注：圆孔筛系列中小于1.25mm的本来就是方孔筛。2y­!Î.„1ךbbs.3c3t.comOÚ<¯ª†hX$f
摘录自《JTJ058-2000公路工程集料试验规程》，已作废，因为现在国标用石筛子也已改为方孔，因此现在有效的《公路工程集料试验规程(JTG E42-2005)》已取消这个表。2y­!Î.„1ךbbs.3c3t.comOÚ<¯ª†hX$f