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Adjusting the backpack belt can be troublesome. It’s normally laborious to make the ends at the same horizontal level. Ruler Backpack Belt has got scales arranged at intervals of 1cm. When using Ruler Backpack Belt, it’s much easier to align the belt with each other. You only need to adjust one side to a particular scale, and then do the same thing to the other side. The belts can be perfectly and quickly put in the right position and discomfort and health problems like even shoulders can be avoided.
East China University of Sci-Tech