材质 
1/2
13
0.9375
0.8125
0.515
0.482
0.625
0.5625
0.6563
0.5938
0.375
0.25
0.3125
5/8
11
1.1406
1.0156
0.642
0.605
0.8125
0.75
0.8438
0.7813
0.4531
0.3281
0.375
3/4
10
1.3438
1.2188
0.768
0.729
1.0625
1
1.0938
1.0313
0.5313
0.4063
0.4375
7/8
9
1.5469
1.4219
0.895
0.852
1.2188
1.1563
1.25
1.1875
0.6094
0.4844
0.5
1
8
1.75
1.625
1.022
0.976
1.375
1.3125
1.4063
1.3438
0.6875
0.5625
0.5625
1-1/8
7
1.9531
1.8281
1.149
1.098
1.5313
1.4688
1.5625
1.5
0.7656
0.6406
0.625