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Open the umbrella in a narrow space is easy to hurt people or things we care, here we provide an elegant way to solve this kind of issue like coming out of the car in a rainy day——an umbrella that can temporary use air force to creative an invisible umbrella. When people walk a while to an open place, they are able to turn the air umbrella into traditional umbrella without trouble.
South China University of Technolog
South China University of Technology