弹簧寿命值高并且稳定；

Spring life value is high and stable;

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用锤头连续敲打金属表面的方法大大地延长了弹簧的使用寿命。

Great improvement has been brought about in the service life of springs by hot peening.

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缺点是可能存在箭钩体磨损与弹簧疲劳问题？使用寿命与用材质密切相关。

The disadvantage is that may exist problems and arrow spring fatigue life and wear hook? Related materials.

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