Monday, November 05, 2007

An escalator is a transport machine for transporting people, consisting of a staircase whose steps move up or down on tracks that stay the surfaces of the individual steps horizontal.A moving walkway, moving sidewalk, revelator, or moderator is a slow conveyor belt that transports people straightly or on a bigotry in a similar manner to an escalator. In both cases, riders can wander or stand. The walkways are often whole in pairs, one for each direction. Modern escalators have metal steps in a stable loop that moves on tracks. Escalators are typically used in pairs with one going up and the other going down.


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