弹簧弹性系数
the coefficient of spring elasticity
弹簧平衡安全阀
spring balance safety valve
天平天国侍王府
Shiwang Residence of Taipingtianguo
滞后弹簧摩擦模型
hysteretic spring friction model
1套排出阀弹簧
1-set Discharge Valve Springs
1套吸入阀弹簧
1-set Suction Valve Springs
3/4椭圆弹簧
three-quarter elliptic spring
38Si7调质弹簧钢
Si7 hardened and tempered spring steel