材质 
1/4
20|28|32|26
0.26
0.237
0.5
0.488
0.28
0.245
0.204
0.172
0.031
5/16
18|24|32|22
0.324
0.298
0.625
0.609
0.342
0.307
0.267
0.233
0.031
3/8
16|24|32
0.388
0.36
0.75
0.731
0.405
0.368
0.331
0.295
0.031
7/16
14|20|28
0.452
0.421
0.875
0.853
0.468
0.431
0.394
0.356
0.031
1/2
13|20|28
0.515
0.483
1
0.975
0.53
0.492
0.458
0.418
0.031
5/8
11|18|24
0.642
0.605
1.25
1.218
0.675
0.616
0.585
0.541
0.062
3/4
10|16|20
0.768
0.729
1.5
1.462
0.8
0.741
0.649
0.601
0.062
7/8
9|14|20
0.895
0.852
1.75
1.706
0.938
0.865
0.776
0.724
0.062
1
8|12|20
1.022
0.976
2
1.95
1.063
0.99
0.903
0.847
0.062