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The box is the main packaging equipment we use in our daily life,However, in many cases it is inconvenient for us to take out the items from the box.The supermarket takes many goods out from the box everyday ，and put them on the shelf， this process is very troublesome and time-consuming.This design increases a compressible structure on the common structure，which makes it more convenient for us to take out items from the box.At the same time it also saves much space.
Dalian Minzu University
Dalian Nationalities University