因素有上下轧辊直径比、压下率、导入角和轧辊转速。

These factors include ratio of upper and lower roll diameter , reduction ratio , enterance angle and roll rotation speed.

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分析并计算了因雷电流的幅值和雷电先导入射角，以及地面倾角变化对绕击率的影响。

And it shows that the shielding failure rate is a function of the ang1e of lightning incidence, strokes lightning amplitude and ground ang1e.

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