Question about PDF import.

#1
Hi.
I used the PDFIMPORT command to import the PDF printed drawings.
However, the properties of a circle or curve are imported into spline and cannot be measured.

In addition, some circles with two lines when imported.
This happens when i save a single line of drawings as PDF and bring them back.
I want you to know what method I should use to import it as it was.

Thank you.
cron