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umbrella is originally used to shelter from rain. When it encounters complex weather condition, the umbrella is no longer a convenient shelter tool, conversely it will cause great danger, for example: on the crowded traffic road, people with umbrella will be blew away by wind,even hit by car.
When it rains, most people is used to bringring an umbrella not a raincoat. The umbrella will turn into raincoat when the rainwear is needed.
Changsha University of Technology
Chinno Industrial Design Co.,Ltd
Haojing Deng Yanze Xie Yu Zhang David Qiu