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It must be a quit familiar condition to all that people forget to zip up their backpacks because time presses, and thus unfortunately lose their property. This backpack we have designed here actually the pack straps with the pack-mouth string. The string tightens up the pack-mouth and the rest part of the string comes out from the pack-mouth and works as the pack straps.
Jiangnan University
Wuxi, China
Jiangnan University
Wuxi, China
Jiadi Ju
Yang Gu
Meng Chen