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freshness bag / freshness bag

freshness bag

The bag can distinguish the freshness of food. It will display
the corresponding color according to the freshness when you
put food into it. the fresher food you put in,the brighter color it
displays. Whereas, darker. It is convenient for you to select and
purchase fresh food.

University

College of Science&Technology

College of Science&Technology
Ningbo university
ningbo, China

lei shi,
College of Science&Technology Ningbo University

Liyuan Liu

Li Chen

Zhenwei Chen,Tingyu Chen

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