材质 
1/4
20|28|32
0.428
0.438
0.488
0.505
0.7
0.728
0.281
0.312
5/16
18|24|32
0.489
0.5
0.557
0.577
0.79
0.82
0.343
0.375
3/8
16|24|32
0.551
0.562
0.628
0.65
0.885
0.915
0.39
0.406
7/16
14|20|28
0.675
0.688
0.768
0.794
1.1
1.131
0.437
0.468
1/2
13|20|28
0.736
0.75
0.84
0.866
1.175
1.205
0.485
0.515
9/16
12|18|24
0.861
0.875
0.982
1.01
1.26
1.3
0.546
0.578
5/8
11|18|24
0.922
0.938
1.051
1.083
1.28
1.36
0.6
0.64