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自检行李箱 / Security check box

自检行李箱
自检行李箱

Will put his hand to pull up the timely detection, when the wheels turn represent the internal is not dangerous goods, the wheel is contains dangerous goods, easy to use

University

Chongqing University

Chongqing University
Chongqing, China

Hepeng Yan,
Chongqing University