Gradual rigidity leaf spring has variable rigidity feature,that causes little or neary no change on offset frequency. 渐变刚度钢板弹簧具有刚度可变的特性，可使偏频变化很小或接近等频特性。
Leaf Springs and goods carriage play an important role in the deformation and stress of a vehicle frame. 摘要钢板弹簧悬架与货厢对车架的变形和应力分布具有重要的影响。
