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Traditional pencil sharpener generally stuck pencil lead, you would have a pencil sharpener apart to remove the pencil lead, this is not very convenient for children. In order to solve this problem, I am in pencil sharpener add a button, once inside the pencil sharpener, pencil refill card can through the button to press the pencil lead.
Fuzhou university institute of arts and crafts in xiamen
Xiamen, China
Manxin Yang,
Fuzhou university institute of arts and crafts in xiamen
Bowei Chen,
Fuzhou university institute of arts and crafts in xiamen
