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Different key / Services

Different key
Different key

Jin Ba: "to give heart to readers:" maybe there will be letters from readers asking about the secret of writing, thought I harbor master key." Oftenencounter plastic composite bags, although there is a tear, but is to tear does not open, many tear with teeth is bad ,so products bright spots will be the key to design a groove. Another bright spot is that its appearance with a groove on oneside, can distinguish the key of the positive and negative. Metal modelling give a person a kind of fashion, and localcharacteristics. To s atisfy the user's visual taste, enhance the use value of the product.

University

Central South University

Central South University
changsha, China

ziyue liu,
Central South University

hao chang,
Central South University

ziqi wei,
Central South University

zhen xiang,
Central South University