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Outdoor public chair after the rain is wet, it is easy to stick ash and is inconvenient for people to use. The backrest can be designed as a flip-style chair, using the principles of the shaft and the spring ,it is flip down when people leaving , thereby avoiding the rainy day get wet and sticky gray.Flat, the back of the chair also can be used as temporary desktop to place some simply items are with sound .
Ping Zou , Bin Long , Lvliang Liu.