3
10
cracks from the hole
to the outer periphery
4
12
no cracks and breakage
5
15
no cracks and breakage
Comparative
0
0.1
1.5
55
1
4
no cracks and breakage
8.0
7.0
example8
2
8
no cracks and breakage
3
10
no cracks and breakage
4
12
no cracks and breakage
5
15
no cracks and breakage
Comparative
0
5
1.2
65
1
4
no cracks and breakage
6.0
5.4
example9