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Modern elevator is mainly composed of traction machine (hoist), guide rail, weighing device, safety device (e.g., speed governor, safety gear, and buffers, etc.), signal control system, the capsules and the hall door, etc. Those parts are installed in the shaft of the building and room. Bypass usually adopts the steel wire rope friction drive, wire rope traction wheel, on both ends of the connection capsules and balance weight respectively, motor drive traction wheel makes the car lift. Elevator requirements, safety and reliability, high transmission efficiency, flat layer accuracy and comfort, etc. Basic parameters of the lift, can take a toll, mainly have the rated load rated speed, the car gabarite and shaft type, etc.
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