材质 
NST3
1.1
6.4
4.1
4
3.82
4.27
3.2
0.1
NST3.5
1.3
7.5
6.9
5
4.82
5.36
3.8
0.1
NST4
1.4
8.5
7.8
5.5
5.32
5.92
4.3
0.2
NST5
1.6
10
9.3
7
6.78
7.55
5.2
0.2
NST5.5
1.8
11.2
10.3
7
6.78
7.55
6
0.2
NST6
1.8
12.8
11.8
8
7.78
8.66
6.7
0.3