并且使受电弓框架垂向位移和侧滚角度足够小，弓网接触压力达到车辆正常曲线通过时的水平。
In the mean time, the vertical and roll motions of the pantograph fame should be as small as possible, so that to make the contact force as normal as the conventional train.
最大接触压力随R值的增大而逐渐减小，且R值的改变对于小尺寸油封最大接触压力的影响较大；
The maximum contact pressure is decreased with the increase of the R value, and the change of R value has more remarkable influence on the maximum contact pressure of the small dimension oil seal.
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