| 摘要 |
A backsack includes a pouch with two first buckle members attached thereto. A positioning device is secured to the pouch. A shoulder strap unit includes two shoulder straps each having a second buckle member for releasably engaging with an associated first buckle member. An engaging device is mounted to the shoulder strap unit and is releasably engaged with the positioning device on the pouch, thereby releasably attach the shoulder strap unit to the pouch.
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