| 摘要 |
<p>The purpose of this invention is to make the chief users of sacks or backpacks such as primary school pupils, middle and high school students, collegians, overseas travellers and backpackers keep and store their personal effects normally contained in the small-sized pocket of the conventional sack or backpack more safely by positioning the opening and closing zipper of the small-sized pocket with the inner storing place into the backside of the big-sized main body pocket.</p> |
