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.
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.
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