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