材质 
1/4
20|28|32
0.448
0.5
0.556
0.577
0.156
0.188
5/16
18|24|32
0.546
0.562
0.622
0.65
0.186
0.22
3/8
16|24|32
0.669
0.688
0.763
0.794
0.216
0.252
7/16
14|20|28
0.728
0.75
0.83
0.866
0.247
0.285
1/2
13|20|28
0.85
0.875
0.969
1.01
0.277
0.317
9/16
12|18|24
0.909
0.938
1.037
1.083
0.307
0.349
5/8
11|18|24
1.031
1.062
1.175
1.227
0.337
0.381
3/4
10|16|20
1.212
1.25
1.382
1.443
0.398
0.446
7/8
9|14|20
1.394
1.438
1.589
1.66
0.458
0.51
1
8|12|20
1.575
1.625
1.796
1.876
0.519
0.575
1-1/8
7|12|18
1.756
1.812
2.002
2.093
0.579
0.639
1-1/4
7|12|18
1.938
2
2.209
2.309
0.687
0.751
1-3/8
6|12|18
2.119
2.188
2.416
2.526
0.747
0.815
1-1/2
6|12|18
2.3
2.375
2.622
2.742
0.808
0.88
1-5/8
6|12|18
2.481
2.562
2.828
2.959
0.868
0.944
1-3/4
5|8|12
2.662
2.75
3.035
3.175
0.929
1.009
1-7/8
6
2.844
2.938
3.242
3.392
0.989
1.073
2
4.5
3.025
3.125
3.449
3.608
1.05
1.138
2-1/4
4.5
3.388
3.5
3.862
4.041
1.155
1.251
2-1/2
4
3.75
3.875
4.275
4.474
1.401
1.505
2-3/4
4
4.112
4.25
4.688
4.907
1.522
1.634
3
4
4.475
4.625
5.102
5.34
1.643
1.763
3-1/4
4
4.838
5
5.515
5.774
1.748
1.876
3-1/2
4
5.2
5.375
5.928
6.207
1.87
2.006
3-3/4
4
5.562
5.75
6.341
6.64
1.99
2.134
4
4
5.925
6.125
6.755
7.073
2.112
2.264