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Elevators Are vertical transportation devices

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Elevators Are vertical transportation devices that are designed to move people or goods between different levels of a building or structure. Elevators consist of a cab or car that moves up and down along vertical rails or guides, which are typically located in a hoistway or shaft that extends through https://prbookmarkingwebsites.com/story15638760/%D8%B4%D8%B1%D9%83%D8%A9-%D9%85%D8%B5%D8%A7%D8%B9%D8%AF-%D9%81%D9%8A-%D9%85%D8%B5%D8%B1
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