| 摘要 |
A back bag such as a back pack, knapsack or a tucksack has a bottom-equipped bag portion, a pair of shoulder straps provided on the body-contact side of the bag portion and adapted to be hung from the user's shoulders, and a hip belt extending from a lower portion of the body-contact side of the bag portion to surround the user's hip bone. The hip belt is made of a left belt and a right belt connected by fastener, so that the hip belt is adjustable in its entire length or its angle of extension.
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