As the negative stepped leader gets closer to the tower, a positive leader forms from the tower tip and moves upward.

随着负极梯级先导向塔不断靠近，塔顶端的正极先导形成并且上行移动。

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As the negative stepped leader gets closer to the tower, a positive leader forms from the tower tip and moves upward.

随着负极梯级先导向塔不断靠近，塔顶端的正极先导形成并且上行移动。

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