材质 
1/4
20|28|32
0.428
0.438
0.488
0.505
0.15
0.163
5/16
18|24|32
0.489
0.5
0.557
0.577
0.18
0.195
3/8
16|24|32
0.551
0.563
0.628
0.65
0.21
0.227
7/16
14|20|28
0.675
0.688
0.768
0.794
0.24
0.26
1/2
13|20|28
0.736
0.75
0.84
0.866
0.302
0.323
9/16
12|18|24
0.861
0.875
0.982
1.01
0.301
0.324
5/8
11|18|24
0.922
0.938
1.051
1.083
0.363
0.387
3/4
10|16|20
1.088
1.125
1.24
1.299
0.398
0.446
7/8
9|14|20
1.269
1.312
1.447
1.516
0.458
0.51
1
8|12|20
1.45
1.5
1.653
1.732
0.519
0.575
1-1/8
7|12|18
1.631
1.688
1.859
1.949
0.579
0.639
1-1/4
7|12|18
1.812
1.875
2.066
2.165
0.687
0.751
1-3/8
6|12|18
1.994
2.062
2.273
2.382
0.747
0.815
1-1/2
6|12|18
2.175
2.25
2.48
2.598
0.808
0.88
1-5/8
6|12|18
2.35
2.43
2.679
2.805
0.868
0.944
1-3/4
5|8|12
2.538
2.625
2.893
3.031
0.929
1.009
1-7/8
6
2.722
2.813
3.103
3.247
0.989
1.073
2
4.5
2.9
3
3.306
3.464
1.05
1.138
2-1/4
4.5
3.263
3.375
3.719
3.897
1.155
1.267
2-1/2
4
3.625
3.75
4.133
4.33
1.401
1.427
2-3/4
4
3.988
4.125
4.546
4.763
1.522
1.556
3
4
4.35
4.5
4.959
5.196
1.643
1.685
3-1/4
4
4.713
4.875
5.373
5.629
1.748
1.814
3-1/2
4
5.075
5.25
5.786
6.062
1.87
1.943
3-3/4
4
5.438
5.625
6.199
6.495
1.99
2.072
4
4
5.8
6
6.612
6.928
2.112
2.201