一个或几个万向节来适应传动角度的变化；一套伸缩花键，能够改变传动轴的现有长度。
There must be one or more universal joints to permit variations in the Angle of drive. there must also be a slip joint that permits the effective length of the propeller shaft to change.
本文提出了一个变步长自适应窗算法，并给出了该算法的原理和如何改变窗口的大小和长度方法的步骤。
A variable step size adaptive window algorithm is proposed in the paper. Give the principle of the proposed algorithm and the way how to vary the step size and window length.
本文提出了一个变步长自适应窗算法，并给出了该算法的原理和如何改变窗口的大小和长度方法的步骤。
A variable step size adaptive window algorithm is proposed in the paper. Give the principle of the proposed algorithm and the way how to vary the step size and window length.
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