B3D-11 | Siemens NX 2206 Tutorial DraftingCenterline, Center Mark Centerlines indicate symmetry axes. They indicate the center of symmetrical components, but also the center of holes and hole axes. Or indicate with a partial circle that several holes are distributed...
![B3D-11](https://learnnx.com/wp-content/uploads/2023/04/pexels-fauxels-3184357-1-1080x675.webp)