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