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Convenient cotton,the appropriate amount of disinfectant used with a hollow plastic tube as a cotton swab stick, just gently pinch one side of plastic tube, broken the membrane in the bottom, the disinfectant swab rod will be automatically absorbed by the cotton, then quickly to help the injured parts. When only used half cotton swab, just broken and throw away the used part, the rest can use the next time.
Central South University
SiChuan university of science &
Hori Design & Consultant Co. Ltd.
Xinwei Yuan Qingqiang Su