材质 
1/4
20|28|32
0.428
0.438
0.488
0.505
0.212
0.226
5/16
18|24|32
0.489
0.5
0.557
0.577
0.258
0.273
3/8
16|24|32
0.551
0.563
0.628
0.65
0.32
0.337
7/16
14|20|28
0.675
0.688
0.768
0.794
0.365
0.385
1/2
13|20|28
0.736
0.75
0.84
0.866
0.427
0.448
9/16
12|18|24
0.861
0.875
0.982
1.01
0.473
0.496
5/8
11|18|24
0.922
0.938
1.051
1.083
0.535
0.559
3/4
10|16|20
1.088
1.125
1.24
1.299
0.617
0.665
7/8
9|14|20
1.269
1.312
1.447
1.516
0.724
0.776
1
8|12|20
1.45
1.5
1.653
1.732
0.831
0.887
1-1/8
7|12|18
1.631
1.688
1.859
1.949
0.939
0.999
1-1/4
7|12|18
1.812
1.875
2.066
2.165
1.03
1.094
1-3/8
6|12|18
1.994
2.062
2.273
2.382
1.138
1.206
1-1/2
6|12|18
2.175
2.25
2.48
2.598
1.245
1.317
1-5/8
6|12|18
2.35
2.43
2.679
2.805
1.364
1.416
1-3/4
5|8|12
2.538
2.625
2.893
3.031
1.46
1.54
1-7/8
6
2.722
2.813
3.103
3.247
1.567
1.651
2
4.5
2.9
3
3.306
3.464
1.675
1.763
2-1/4
4.5
3.263
3.375
3.719
3.897
1.89
1.986
2-1/2
4
3.625
3.75
4.133
4.33
2.105
2.209
2-3/4
4
3.988
4.125
4.546
4.763
2.319
2.431
3
4
4.35
4.5
4.959
5.196
2.534
2.654
3-1/4
4
4.713
4.875
5.373
5.629
2.749
2.877
3-1/2
4
5.075
5.25
5.786
6.062
2.964
3.1
3-3/4
4
5.438
5.625
6.199
6.495
3.178
3.322
4
4
5.8
6
6.612
6.928
3.393
3.545