[CMMMC]

Can't we combine them into one when the curves overlap as shown in the picture below?

[Jeremy]

Did you use the "edit path setting"->"Offset" to have this result?

If so you need to delete a few points from the selected path.
Go to "Tools"->"Modify Curve" -> "Right-click" a point -> "Delete Curve Point"

JEremy

[CMMMC]

If you use "delete curve point", the line changes weirdly. I want a smooth path.

[Jeremy]

是的,这不是一个防弹的壮举ure.

Do you use a CAD software? If so, which one?

[CMMMC]

I'm using inventor

[Jeremy]

Great, did you see we have a plugin for Inventor?

//www.sinclairbody.com/doc/en/Plugin-Invento...inInventor

CAD softwares such as Inventor are WAY better at doing CAD work like offsetting lines and stuff.
If I was you, I would create the offset path directly in Inventor and bring it to RDK. Take a look at the tutorials in the previous link or this one from our SolidWorks plugin (works the same as the Inventor one and showcase the line offset)
https://youtu.be/IkiwigxWPow

Jeremy