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An escalator is a type of moving staircase that is designed to transport people between different floors of a building efficiently and safely. It consists of a continuously circulating chain of steps driven by an electric motor. Escalators are commonly used in shopping malls, airports, metro stations, and other public buildings where large volumes of people need to move vertically in a smooth and convenient manner. Unlike elevators, which move vertically and stop at designated floors, escalators provide a constant flow of movement, allowing people to step on and off at any point where the escalator begins or ends. The basic structure of an escalator includes several key components. The main parts are the steps, which are connected in a continuous loop, the handrails, the balustrades, and the drive system. The steps are designed with a series of grooves that mesh with comb plates at the entry and exit points to ensure smooth boarding and disembarking. The handrails move synchronously with the steps to _________ ____ _________ _____ _______ _____ _______ _____ ____ ______ __________ ___.
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