Obtaining the way of power source of the strong arc force was clearly shown.
并且指出正确设计电源外特性，是获得较强电弧穿透力的途径。
So there is no force along the arc, but there must be a normal force.
所以在弧线上没有力，但是肯定存在法向力。
Intensive arc drive force, Prevent to be stuck.
电弧推力强、防粘。
Intensive arc drive force, Prevent to be stuck.
电弧推力强、防粘。
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