Escalator

Access escalators to Christ the Redeemer statue in Rio de Janeiro, Brazil

An escalator is a moving staircase – a conveyor transport device for carrying people between floors of a building. The device consists of a motor-driven chain of individually linked steps that move up or down on tracks, allowing the step treads to remain horizontal.

单词	Moving stairway
释义	Moving stairway 英语百科 Escalator An escalator is a moving staircase – a conveyor transport device for carrying people between floors of a building. The device consists of a motor-driven chain of individually linked steps that move up or down on tracks, allowing the step treads to remain horizontal.
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Moving stairway

Escalator