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@Ðˆê4*íbbs.3c3t.comwØ´¢“±ÔՓ
圆孔筛孔径(mm)        对应的方孔筛孔径(mm)                @Ðˆê4*íbbs.3c3t.comwØ´¢“±ÔՓ
      100                                        75        @Ðˆê4*íbbs.3c3t.comwØ´¢“±ÔՓ
      80                                        63        @Ðˆê4*íbbs.3c3t.comwØ´¢“±ÔՓ
      63(或60)                              53        @Ðˆê4*íbbs.3c3t.comwØ´¢“±ÔՓ
      50                                        37.5        @Ðˆê4*íbbs.3c3t.comwØ´¢“±ÔՓ
     40                                        31.5        @Ðˆê4*íbbs.3c3t.comwØ´¢“±ÔՓ
     31.5(或30)                           26.5        @Ðˆê4*íbbs.3c3t.comwØ´¢“±ÔՓ
     25                                       19        @Ðˆê4*íbbs.3c3t.comwØ´¢“±ÔՓ
     20                                       16@Ðˆê4*íbbs.3c3t.comwØ´¢“±ÔՓ
    16                                       13.2        @Ðˆê4*íbbs.3c3t.comwØ´¢“±ÔՓ
    10                                       9.5@Ðˆê4*íbbs.3c3t.comwØ´¢“±ÔՓ
    5                                         4.75@Ðˆê4*íbbs.3c3t.comwØ´¢“±ÔՓ
   2.5                                       2.36@Ðˆê4*íbbs.3c3t.comwØ´¢“±ÔՓ
   1.25                                     1.18@Ðˆê4*íbbs.3c3t.comwØ´¢“±ÔՓ
   0.63                                     0.6@Ðˆê4*íbbs.3c3t.comwØ´¢“±ÔՓ
   0.315                                   0.3@Ðˆê4*íbbs.3c3t.comwØ´¢“±ÔՓ
   0.16                                     0.15@Ðˆê4*íbbs.3c3t.comwØ´¢“±ÔՓ
   0.075                                   0.075@Ðˆê4*íbbs.3c3t.comwØ´¢“±ÔՓ
　        　@Ðˆê4*íbbs.3c3t.comwØ´¢“±ÔՓ
注：圆孔筛系列中小于1.25mm的本来就是方孔筛。@Ðˆê4*íbbs.3c3t.comwØ´¢“±ÔՓ
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。@Ðˆê4*íbbs.3c3t.comwØ´¢“±ÔՓ