Theoretical formulas were established by overall analysis to the progressive rate springs with variable arm length, and their results were obtained by experiment test.
通过对变撑臂渐硬性钢板弹簧的全面研究，推导出理论计算公式；通过试验测试，得到了试验结果。
Theoretical formulas were established by overall analysis to the progressive rate springs with variable arm length, and their results were obtained by experiment test.
通过对变撑臂渐硬性钢板弹簧的全面研究，推导出理论计算公式；通过试验测试，得到了试验结果。
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