Question

What is an escalator?​

Answer 1

Introduction. Escalators are mechanical devices used for transporting people vertically between different levels of buildings. Typically, they take the form of a moving staircase, consisting of a 'chain' of single-piece aluminium or stainless steel steps guided by a system of tracks in a continuous loop.

Answer 2

Explanation:

the automatically moving staircase mostly found in a mall or a threater is called escalator.

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