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NUAN is a type of hot-water bottle which can be heated by sun, suitable for using outside and inside. Firstly, the bottle fully filled with water is flatted in the sunlight. And then roll it up and carry it in hand for use after the water is completely heated.
Dalian Minzu University
Dalian, China
Furong Zhang,
Dalian Nationalities University
Hengchang Su,
Dalian Nationalities University
Jianzhuang Tian,
Dalian Nationalities University
Yuqian Jin,
Dalian Nationalities University