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The peculiarity of V-Ring is that tis joins is V-shaped,using its own
elasticity, it can its ownElasticity controlling keys in and out.the V-shaped
Can make the key in and out easyand ensure That the keys will not fall off on their own.
It is easy to processing and production ,and it is more Convenient to use than ordinary key ring.
East china jiao tong university
Nanchang city, China
East China jiaotong University
Danyang Zhang Jinpo Zhang Ranran Guo Yinke Wang