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This pencil lead is in shape of paperclip. It can be used as not only a common pencil lead but also a paperclip. In the office, it can be used as a paper clip. Other than fix files, the trouble of being not able to find pens is avoided and the signing of files becomes convenience.
Dalian Nationalities University
Dalian, China
Hongtao Miao;
Ying Huo;
Xuefei Liu;
Di Fang
