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It’s inconvenient to carry trolley case with you every moment in a crowded public places.With this security trolley case, you will relief yourself from being alarming all the time,which largely helps with your journeys
We design a scalable lock at the main handle in the light of structure character, which greatly solves the loss accidents.
Nanchang University
NanChang, China
heqi zhao,
Nanchang university
