When the incident Angle is around the three angles, the lateral shift is very large.
当入射角在这三个角附近时，横向偏移变得非常大。
That is, the smaller scribe-wheel Angle is, the easier lateral crack is to appear.
可见刀轮角度越小，越容易出现横向裂纹。
That is, the smaller scribe-wheel Angle is, the easier lateral crack is to appear.
可见刀轮角度越小，越容易出现横向裂纹。
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