Elevator | Regulations, Maintenance & Modernization | Britannica
britannica.com
Elevator | Regulations, Maintenance & Modernization | Britannica
Elevator, car that moves in a vertical shaft to carry passengers or freight between the levels of a multistory building. Most modern elevators are propelled by electric motors, with the aid of a counterweight, through a system of cables and sheaves (pulleys). By opening the way to higher buildings,
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