结果表明：防撞梁的瞬态冲击载荷不仅与冲击距离呈线性关系，而且和提升容器下降侧与上升侧的张力差、提升钢丝绳的弹性系数有关。

The instantaneous impact force is linear with impact distance, and depends on the difference in tension between descending and ascending vessels and the elastic coefficients of hoisting ropes.

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升降索通常从帆的前侧延伸到桅杆顶端，然后下降到甲板平面，在甲板上拉起升降索就能升起船帆。

The halyard typically rises from the head of the sail to a block at the head of the mast and back down to deck level, from where it is pulled up to raise the sail.

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救援人员不得不从屋顶用绳索从建筑的一侧下降，以营救这两名被他们的安全挽具吊着的工人。

The rescuers had to rappel from the roof down the side of the building to save the two men left hanging by their safety harness es.

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