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Definition of Platform screen door
1. Noun. One of a series of doors at a train or subway station, at the edge of a platform, that prevents access beyond the platform when there is no train to be boarded ¹
¹ Source: wiktionary.com
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1. Noun. One of a series of doors at a train or subway station, at the edge of a platform, that prevents access beyond the platform when there is no train to be boarded ¹
¹ Source: wiktionary.com