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This is the structure of innovative design pencil sharpener, pencil sharpener can adjust the angle. Usually written using pencil sharpener often too short, too long a cartridge will happen. In addition to regular pencil. Also a waste of resources. Works by changing the inclination of the blade, thereby changing the shape of a written Friction area can be used to repair the shape of the tip, such as a dedicated exam 2B pencil. Overall simple and elegant.
Fuzhou University
academy of arts and crafts
Xiamen, China
Fuzhou University
academy of arts and crafts
Xiamen, China
Fuzhou University
academy of arts and crafts
Xiamen, China
Fuzhou University
academy of arts and crafts
Xiamen, China
Huiling Hu