PDF import circle become curve

I have a PDF export from AutoCAD, there are a few circles, but when import the PDF to Rhino, the circle became curve.

How to import PDF with circle correctly?

I think you have to check the export options in AutoCAD first.

There is no such thing as a circle (or arc) in PDF. If you want a circle you would need to use DXF or DWG format.

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