In daily life, the use of ruler is very common. Whether as a student, a carpentry, or an office, it is an essential utensil.Today, I will talk about the types of ruler and daily protection methods.
Introduction to stationery ruler
The ruler is also called the ruler and the ruler. It is a tool or instrument used to draw line segments (especially straight).In the rulers diagram, the ruler is considered an infinitely straight -line tool.There is usually a scale on the ruler to measure the length.Some ruler leaves a special shape such as letters or circles in the middle, which is convenient for users to draw pictures.The ruler is usually made of plastic or iron, and is made of hard paper, wood, and bamboo.
Types of stationery ruler
"Snake ruler" is a ruler for drawing curves.The triangular ruler is a ruler of a right triangle or a waist triangle. The right -angle triangle board can be used to draw right angles, and it is convenient to draw a flat line or vertical line with straight ruler.Calculation ruler: a calculation tool.Soft ruler: Commonly used to measure the human body.Pull ruler: used to measure buildings, furniture, etc.Cabinet card ulnar: It is used to measure small things.In the rulers drawing, the ruler is considered an infinitely straight -line tool.
Student stationery ruler is generally made of plastic, of which the triangular ruler and straight ruler and round ruler are the most common.
Daily protection of stationery ruler
1. First of all, the use of ruler should be correct. For example, when the boundary material is planned, it is best not to use a plastic ruler, which will easily be scratched.There are also many people who make a mistake, that is, when the line is drawn, it will be fast, and then it will pass through the ruler because of the slippery characteristics of the ruler, so that the cost will be made, so the speed is moderate.
2. It is best not to mix with the knife or metal stationery. Mixing with the pen must put on the pen.
3. It is necessary to prevent exposure and long -term sunlight, especially the temperature resistance of the plastic ruler is not good, it will deform
4. It is best not to wash it, which means that you should try not to stain your ruler.