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When we measuring the length, we always stop because of the limit of the ruler.
When we need to draw/cut the line on paper, we always measure tiwce times and then make a line.
Using the laser light on the ruler, we make the ruler to become unlimit.
Tatung University
Taipei, Taiwan
Tatung University
Taipei, Taiwan
Pei-Chun Liao
Tatung University
Taipei, Taiwan
Pei-Chun Liao