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Hairdryer is absolutely a good product for wet hair. But there are a number of disadvantages of traditional hairdryer. Handheld hairdryer(HH) can solve these problems well. For example, it blows hairs around the head with 360 degree movements. It shortens the distance from barycenter to the hand, which will feel more comfortable. Also, winds enter from the bottom of HH, preventing inhalation of long hairs.
University of Electronic Science and Technology of China Zhongshan Institute