关于筛分的问题？？？？？？？？？？？ [复制链接]

圆孔筛与方孔筛的对应关系 表2ÛRíE>çiŒŽ!bbs.3c3t.com2C¯ûýÀ昢>
圆孔筛孔径(mm)        对应的方孔筛孔径(mm)                ÛRíE>çiŒŽ!bbs.3c3t.com2C¯ûýÀ昢>
      100                                        75        ÛRíE>çiŒŽ!bbs.3c3t.com2C¯ûýÀ昢>
      80                                        63        ÛRíE>çiŒŽ!bbs.3c3t.com2C¯ûýÀ昢>
      63(或60)                              53        ÛRíE>çiŒŽ!bbs.3c3t.com2C¯ûýÀ昢>
      50                                        37.5        ÛRíE>çiŒŽ!bbs.3c3t.com2C¯ûýÀ昢>
     40                                        31.5        ÛRíE>çiŒŽ!bbs.3c3t.com2C¯ûýÀ昢>
     31.5(或30)                           26.5        ÛRíE>çiŒŽ!bbs.3c3t.com2C¯ûýÀ昢>
     25                                       19        ÛRíE>çiŒŽ!bbs.3c3t.com2C¯ûýÀ昢>
     20                                       16ÛRíE>çiŒŽ!bbs.3c3t.com2C¯ûýÀ昢>
    16                                       13.2        ÛRíE>çiŒŽ!bbs.3c3t.com2C¯ûýÀ昢>
    10                                       9.5ÛRíE>çiŒŽ!bbs.3c3t.com2C¯ûýÀ昢>
    5                                         4.75ÛRíE>çiŒŽ!bbs.3c3t.com2C¯ûýÀ昢>
   2.5                                       2.36ÛRíE>çiŒŽ!bbs.3c3t.com2C¯ûýÀ昢>
   1.25                                     1.18ÛRíE>çiŒŽ!bbs.3c3t.com2C¯ûýÀ昢>
   0.63                                     0.6ÛRíE>çiŒŽ!bbs.3c3t.com2C¯ûýÀ昢>
   0.315                                   0.3ÛRíE>çiŒŽ!bbs.3c3t.com2C¯ûýÀ昢>
   0.16                                     0.15ÛRíE>çiŒŽ!bbs.3c3t.com2C¯ûýÀ昢>
   0.075                                   0.075ÛRíE>çiŒŽ!bbs.3c3t.com2C¯ûýÀ昢>
　        　ÛRíE>çiŒŽ!bbs.3c3t.com2C¯ûýÀ昢>
注：圆孔筛系列中小于1.25mm的本来就是方孔筛。ÛRíE>çiŒŽ!bbs.3c3t.com2C¯ûýÀ昢>
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。ÛRíE>çiŒŽ!bbs.3c3t.com2C¯ûýÀ昢>