将弯曲胳膊的对侧的腿弯曲，并交叉与另外的腿上。

Cross the leg opposite your bent arm over your other leg.

youdao

本文分析了门式起重机腿端约束，侧移及正、反对称屈曲形式对支腿整体稳定性的影响。

This paper analyses the influence of end constraints, side displacement, positive and negative symmetric buckling form on integral stability of gantry crane's supporting legs.

youdao