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In order to open a plastic bag, We will do the same action that is rubbing bags. This Connected plastic bags like pumping paper,When we draw a plastic bag, the next plastic bag mouth will be opened.
Jiangxi University of Finance and Economics
Nanchang, China
Jiangxi University of Finance and Economics
Nanchang, China
yongzhong he
xinying wu
yunhu yang
kaiyan wu
