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We ofen throw some pencil ends .Thinking about it.Can we use them again?Now,the \"rewnew-pencil\"
can solve this problem by use the simple way.We can combine two pencil ends with stick,then one reuse pencil will come out.So this design can reduce
the consumption of wood.The throwed pencils can excape from the reject,and get a new life.
ZHENGZHOU UNIVERSITY OF LIGHT INDUS
ZHENGZHOU, China
Kejian Wang.Tingting Zhang.Xueling An,Mingfan Wei,Jinbin Wang.
ZHENGZHOU UNIVERSITY OF LIGHT INDUS
ZHENGZHOU, China
Kejian Wang,Tingting Zhang,Fanming Wei,Xueling An,Jinbin Wang.