Gradual rigidity leaf spring has variable rigidity feature, that causes little or nearly 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。
2
Based on field geological observation and the preserved Quaternary offset, the authors discovered active faults since Quaternary in Jimo hot spring basin.