Universal angle ruler - high precision/Single and multicolor

I have done precision testing and can be said to be quite professional. Using 3D printing as a testing tool, to be honest, is almost impossible. Not to mention other things, just the differences in equipment and materials, shrinkage, this thing cannot be overcome. Among the hundreds of testing tools and equipment I have come into contact with, only this one can be 3D printed with a certain level of accuracy - the universal angle ruler. Its accuracy direction is in the circumferential direction, and the shrinkage effect is very small due to differences in equipment and materials. During the production process, I felt that although 3D printing has weaknesses in strength and accuracy compared to traditional processing, it also has huge advantages, especially for structurally complex parts. Traditional manufacturing processes require more than 10 components to produce a universal angle ruler, while 3D printing can reduce the number of parts by more than double while ensuring all its functions.