材质 
1/4
20|28|32
0.502
0.492
0.552
0.296
0.266
0.194
5/16
18|24|32
0.564
0.553
0.622
0.328
0.298
0.212
3/8
16|24|32
0.69
0.679
0.766
0.421
0.391
0.251
7/16
14|20|28
0.752
0.741
0.837
0.453
0.423
0.316
1/2
13|20|28
0.877
0.865
0.978
0.546
0.516
0.36
9/16
12|18|24
0.94
0.928
1.051
0.578
0.548
0.421
5/8
11|18|24
1.064
1.052
1.191
0.624
0.594
0.428
3/4
10|16|20
1.252
1.239
1.403
0.718
0.688
0.488
7/8
9|14|20
1.44
1.427
1.615
0.796
0.766
0.535
1
8|12|20
1.627
1.614
1.826
0.922
0.86
0.6
1-1/8
7|12|18
1.814
1.801
2.038
1
0.938
0.627
1-1/4
7|12|18
2.008
1.973
2.232
1.14
1.078
0.72
1-3/8
6|12|18
2.197
2.159
2.444
1.219
1.157
0.767
1-1/2
6|12|18
2.384
2.344
2.622
1.344
1.282
0.81
1-3/4
5|8|12
2.762
2.715
3.075
1.532
1.406
0.986
2
4.5
3.137
3.086
3.497
1.735
1.609
1.016
2-1/4
4.5
3.514
3.457
3.918
2.001
1.875
1.179
2-1/2
4
4.015
3.875
4.393
2.25
2.124
1.523
2-3/4
4
4.015
3.875
4.393
2.25
2.124
1.523
3
4
4.64
4.5
5.102
2.788
2.662
2.075