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When the high-rise fire,lifts running slowly very much,people jumped to survive in an emergency situation,but often suffer injury or even death.
This design in high building (near the window) wall groove,with the use of escape tools. People can quickly descend to the air cushion.Rubber can increase friction,reduce the falling speed and damping.
If there is no air cushion ,groove in about 2 m from the ground disappear ,people can jump to the ground,waiting
xiaocheng Ji hongqiang Yuan