材质 
1/4
20|28|32
0.506
0.489
0.556
0.39
0.36
0.29
5/16
18|24|32
0.566
0.551
0.624
0.453
0.423
0.335
3/8
16|24|32
0.691
0.675
0.763
0.562
0.532
0.392
7/16
14|20|28
0.754
0.736
0.829
0.609
0.579
0.464
1/2
13|20|28
0.879
0.861
0.969
0.718
0.688
0.544
9/16
12|18|24
0.942
0.922
1.037
0.812
0.782
0.655
5/8
11|18|24
1.067
1.045
1.175
0.874
0.844
0.677
3/4
10|16|20
1.255
1.231
1.382
1.015
0.985
0.79
7/8
9|14|20
1.444
1.417
1.589
1.14
1.11
0.883
1
8|12|20
1.632
1.602
1.796
1.312
1.25
1
1-1/8
7|12|18
1.82
1.788
2.002
1.469
1.407
1.096
1-1/4
7|12|18
2.008
1.973
2.209
1.672
1.61
1.25
1-3/8
6|12|18
2.197
2.159
2.416
1.828
1.766
1.376
1-1/2
6|12|18
2.384
2.344
2.622
1.953
1.891
1.413
1-5/8
6|12|18
2.572
2.53
2.886
2.172
2.11
1.637
1-3/4
5|8|12
2.762
2.715
3.035
2.376
2.25
1.83
1-7/8
6
2.95
2.901
3.242
2.422
2.296
1.875
2
4.5
3.137
3.086
3.449
2.469
2.343
1.75
2-1/4
4.5
3.514
3.457
3.862
2.876
2.75
2.063
2-1/2
4
4.015
3.875
4.618
3.204
3.078
2.475
2-3/4
4
4.015
3.875
4.618
3.204
3.078
2.35
3
4
4.64
4.5
5.102
3.704
3.578
2.75