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"Reborn"is a pen recycling circulatory system designed to reduce the waste of penstocks after pen refills are used out.Only putting the old pen into entrance and gyrating the knob may you attain the new pen from exit. This process could help the user have the good habit of saving and recycling.
Yi-de Zhou,Na Dai,Xin Bao,Yong-hai Zhang,Yin Li,Kai Xue