英语语法分析

In the end, the optimization of the autofrettage pressure is achieved.

利用以上这些结论，从疲劳寿命的角度实现了对预紧压力的优化。

It proved that autofrettage technique is better than shrunk principle by analyze stress.

通过应力分析，论证了用自增强技术优于缩套原理的结论。

The result shows that the fatigue life of autofrettage vessels can be increased by 8 times.

结果表明，经自增强处理者其疲劳开裂寿命可提高8倍。