[Gmsh] GMSH meshing for complex CAD model

[zhwang]

Hello all,
Now I have a problem about how to meshing a CAD model (.stp format) in GMSH?
The property of the CAD model is:
(1) complex
(2)a lot of detail

I want to mesh it in different resolutions for different regions.

Could anyone help?

Thanks a lot for  any clues! ;-)
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zhaoguang wang