three steps escalator for wheelchair 轮椅用三梯级自动扶梯
It is best described as a moving sidewalk that looks like an escalator without steps.
最好的形容就是一个会移动的人行道，看起来像没有阶梯的手扶梯。
Angel has Western Europe's longest escalator - 318 steps.
天使站拥有西欧最长的扶梯——318级。
The traditional escalator works by turning the steps upside down and looping them underneath the staircase to take them back to the start.
传统手扶电梯的工作原理是依靠楼梯上升后，在终点处回环，再变做楼梯下面继续运行，从而实现楼梯的颠倒，重复循环使用；
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