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An escalator is a moving staircase designed to transport people efficiently between different levels of a building, typically within commercial complexes, airports, metro stations, and other high-traffic areas. Unlike elevators, which carry people vertically in a confined space, escalators provide continuous movement, allowing passengers to step on and off at different points. Escalators are considered an essential component of modern building design due to their ability to manage large volumes of pedestrian traffic while maintaining comfort and safety. Structurally, an escalator consists of several key components. The main elements include a motor, drive system, steps, handrails, and supporting framework. The steps of an escalator are connected in a loop, forming a continuous chain that moves over a track system. Each step has a tread, which is the flat portion on which passengers stand, and a riser, which is the vertical part of the step. The ____ ________ _______ _______ _________.
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