Elevator 14
Elevator 14 : Types of Hoist Mechanisms: (3) Traction-Hydraulic Elevators: The traction-hydraulic elevator has overhead traction cables and counterweight, but is driven by hydraulic power instead of an overhead traction motor. The weight of the car and its passengers, plus an advantageous roping ratio, reduces the demand from the pump to raise the counterweight, thereby reducing the size of the required machinery
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