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The cash register paper / office supplies

The cash register paper

What the special part of the design is that the cash register paper is made of the paper with some certain color-changed material.The deep color paper is the original one.But when the paper is pushing out of the cash register,it will be a light one.With time is going on,the paper is going to change the color itself,which is going deeper and deeper till becoming the initial color.It will be so easy for the server to distinguish the order by different color,which is more efficient.

University

Xiamen Univercity of Technology

Xiamen Univercity of Technology
Xiamen, China

Zhuona Tang,
Xiamen Univercity of Technology