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When we eat biscuit , hands are always dirty . In the packaging
with two cots , takeing out the cookies is very convenient . And
keep your fingers clean, don`t need to wipe and wash your hands
Yanshan University
Qinhuangdao, China
Fang Liu,
Yanshan University
Yibo Wang ,
Yanshan University
Xu Li,
Yanshan University
Qiao Jian,
Yanshan University
