| 摘要 |
PURPOSE: A secondary bag for backpack is provided to safely store important stuffs and prevent movement of the backpack while moving. CONSTITUTION: A secondary bag for backpack comprises a main body of bag(10), a first loop(20), and a second loop(30). A receiving space is prepared inside the main body of the bag. In the edge sides, zipper members which opens and closes the receiving space are installed according to movement of the bag. The first loop is included in the lower part of the rear side of the main body of the bag. The second loop is included in the rear top of the main body of the bag. The secondary bag is placed at a location which is inclined to rearwards from the vertical central line in order to prevent movement to the right and left sides.
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