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A “Writing” Ruler / Ball Pen

A “Writing” Ruler
A “Writing” Ruler

Not only is it a press type ball pen,but also can be used as ruler.Sharp corners prevent the ball pen rolling down from the table.Increasing function by a small change,and ensure its comfortableness at the same time.


Fuzhou University

Fuzhou University
Xiamen, China

Sherry Kuo,
Fuzhou University

Yiwen Liu,
Fuzhou University