材质 
1/4
20|26
0.2
0.19
0.445
0.438
0.428
0.418
5/16
18|22
0.25
0.24
0.525
0.518
0.508
0.498
3/8
16|20
0.312
0.302
0.6
0.592
0.582
0.572
7/16
14|18
0.375
0.365
0.71
0.702
0.69
0.68
1/2
12|16
0.437
0.427
0.82
0.812
0.8
0.79
9/16
12|16
0.5
0.49
0.92
0.912
0.9
0.89
5/8
11|14
0.562
0.552
1.01
1
0.985
0.975
3/4
10|12
0.687
0.677
1.2
1.19
1.175
1.165
7/8
9|11
0.75
0.74
1.3
1.288
1.273
1.263
1
8|10
0.875
0.865
1.48
1.468
1.453
1.443
1-1/8
7|9
1
0.99
1.67
1.64
1.62
1.61
1-1/4
7|9
1.125
1.105
1.86
1.815
1.795
1.785
1-3/8
8
1.25
1.23
2.05
2.005
1.985
1.975
1-1/2
6|8
1.375
1.355
2.22
2.175
2.155
2.145
1-3/4
5|7
1.625
1.605
2.58
2.52
2.495
2.485
2
4.5|7
1.75
1.73
2.76
2.7
2.675
2.665