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The compass has automatic lead core and pen clip. Automatic lead core type, press out core, no need to adjust, easy to use. Any pen can be clamped and the position can be customized. The compass has smooth lines and accurate drawing. It supports transparent square design, which makes it easier to identify right angles.
Ruler, also known as ruler and interval ruler, is a tool for drawing line segments (especially straight ones) and measuring angle length. General ruler set refers to straight ruler, right triangle ruler, obtuse triangle ruler and protractor. In mathematics and drawing, compasses are tools used to draw circles or chords. They are often used for drawing with rulers and compasses.
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Ningbo Rainma Stationery Co., Limited.