材质 
1/4
20|28|32
0.26
0.237
0.493
0.445
0.15
0.131
5/16
18|24|32
0.324
0.298
0.618
0.558
0.189
0.164
3/8
16|24|32
0.388
0.36
0.74
0.668
0.225
0.196
7/16
14|20|28
0.452
0.421
0.803
0.726
0.226
0.196
1/2
13|20|28
0.515
0.483
0.935
0.845
0.269
0.233
5/8
11|18|24
0.642
0.605
1.169
1.066
0.336
0.292
3/4
10|16|20
0.768
0.729
1.402
1.285
0.403
0.349
7/8
9|14|20
0.895
0.852
1.637
1.511
0.47
0.408
1
8|12|20
1.022
0.976
1.869
1.735
0.537
0.466
1-1/8
7|12|18
1.149
1.098
2.104
1.962
0.604
0.525
1-1/4
7|12|18
1.277
1.223
2.337
2.187
0.671
0.582
1-3/8
12|18
1.404
1.345
2.571
2.414
0.738
0.641
1-1/2
6|12|18
1.531
1.47
2.804
2.64
0.805
0.698