Other Free Encyclopedias » 21st Century Webster's Family Encyclopedia » 21st Century Webster's Family Encyclopedia - Erasistratus to Federalism



Escalator, moving stairway used in public buildings to transport passengers from one level to another. The steps move on a continuous belt and fold flat at the top and bottom to allow passengers to step on and off easily. An average-size escalator can carry over 5,000 passengers an hour.

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