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Pencil is a consumptive writing tool in common use, however discard it when it passes to the shortest section. If user have an aqueduct which can connect to the next pencil to keep use without wasting the resource.
National Cheng Kung University
Department of Industrial Design
Tainan City, Taiwan
National Cheng Kung University
Department of Industrial Design
Tainan city, Taiwan
Chao-Ming Chen
National Cheng Kung University
Department of Industrial Design
Tainan City, Taiwan
Cheng-Yong Huang
