此时，顺时针旋转和逆时针旋转的螺旋桨产生的扭力刚好平衡。
When doing so, the forces between the clockwise props on one hand, and the counter-clockwise props on the other hand, are balanced out.
唯一的一种平衡，平衡是不够灵敏，小螺旋桨是磁性的类型。
The only type of balancer that is sensitive enough to balance small propellers is the magnetic type.
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