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Center Ruler / Ruler

Center Ruler
Center Ruler

Before using the cylinder to make some construction or models (such as drilling or cutting into equal parts), people should found out where the circle centre is first. Some of them try to use rulers to do that, but it won’t be accurate, or others may choose very expensive device. According to the observation, I want to use just a small ruler to meet their needs – find out the circle centre easily and cheap.


Meng-Kai, Lin

Meng-Kai, Lin
Taichung City, Taiwan


National Taiwan University Of

National Taiwan University Of
Science And Technology
Kaohsiung, Taiwan