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Through Curve-Measure Pen, it is not necessary to measure by flaring out the curved things.The second, when the length reaches the point you want, the pen will remind you by the blue button's springing. So you will never need to take the tape measure with you all the time and be restricted by the length and the scale.
Tsinghua University
Beijing, China
Jun Cai
Samsung Design Membership China
Shanghai, China
Duo Bi,Tian Gao