1cm: the length between scales 8 and 9.
2 cm: the length between 0 and 2 scales.
3 cm: the length between scales 2 and 5.
4 cm: the length between scales 5 and 9.
5cm: the length between 0 and 5 scales.
6 cm: the length between scales 2 and 8.
7 cm: the length between scales 2 and 9.
8 cm: The length between 0 and 8 scales.
9 cm: the length between 0 and 9 scales.
Daily protection
1, first of all, use the ruler correctly. For example, it is best not to use a plastic ruler when delineating materials, which will easily scratch. There are also many people who will make a mistake, that is, they will draw lines quickly, and then they will draw along the ruler because of its slippery characteristics, which will blur the graphics, so the speed is moderate.
It's best not to mix a ruler with a knife or metal stationery. When mixing with pens, be sure to cover the pen cover.
3. The ruler has a sharp part, so be careful when using it to avoid scratches.