Removing Center Lines From DXF Export

Hello I am using rhino to draw the 3d object and then I extract out the parts onto a 2d surface so they can be cut on a cnc. During the export / import I am getting weird lines in the middle of each panel.

The reason I think rhino is adding these lines is because you can see them in the drawing.
The lines i am trying to remove are indicated by the red arrows (there are a bunch)

here is the program I am importing it into

I can manually delete the lines every time but it is a little annoying to keep doing this.

Thanks in advance for any help you can give

those lines are the surface isocurves. I don’t know how you export the file but maybe you need to use Make2d first to get only the flat curves to export.