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Sometimes, specially for young ladies, bottle cap is very hard to open, because the lower ring of cap is tightly connected to the upper part, and the 2 parts turns together. In this case, we redesigned the lower ring, stop turning by teeth, make it easily to open.
Zhejiang University of Technology
Blotting Studio, Zhijiang College
Hu Yichuan Wu Xiaowei Wu Shuangshuang Wu Ye Xia Jianlei Shen Yongxu Yan Ziyun Wu Xiaojing Li Juan Xia Yingchong Wang Dong Zhang Shuai