Based on the acute disease patients and the elderly design a portable cup, make life more convenient. There are deficiencies in the design. I hope you can guide me.
Has cast the competition, infringement must be investigated, prohibit misuse reprint please indicate
本作品版权归 lin-H 所有，禁止匿名转载及个人使用，任何商业用途均需联系原作者。
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It's too high tech to understand.
Excellent
Afraid of old people playing don't understand
It feels a little too high-tech