When applying for a patent, the attached drawing is a three-dimensional drawing, and I used UG. How is the serial number marked on it? As shown below.

First, export the diagram on UG to a CAD file and mark it in CAD.

Among them, exporting a drawing on UG to a CAD file can be referred to as follows:

1. First, switch the "modeling" environment to the "drawing" environment in UG.

2. Then add the basic view to the drawing page.

3. export the drawing file to CGM format file.

4. Create a new model file in the interface and import the CGM file.

5. Finally, export the file in the interface as a cad file.