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正板栅用低锑合金，负板栅用铅钙合金的汽车用铅酸蓄电池，有时会出现早期容量衰减现象。
Automotive lead acid batteries using low Sb positive grids and Pb ca negative grids sometimes suffer from the phenomena of premature capacity loss (PCL).
根据疲劳试验结果，建立了预应力钢纤维混凝土板弯曲疲劳方程和剩余强度衰减方程，分析了抗弯刚度衰减规律。
According to fatigue experiment results, the fatigue equation and equation of surplus strength degradation are built. The law of degradation of flexural rigidity is analyzed.
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