[Gmsh] How can I make coincidental mesh for subdivided surfaces

[Dokeun Hwang]

Dear all
I’d like to mesh on 3 curved and neighboring surfaces.
A curve of the one surface has 2 overlapped curves  which are belonging to the other 2 surfaces.
when I meshed them, there boundaries do not have the same 1D mesh points even though I set the number of 1D mesh for them. For example, 2 curves have 10 points for each and the overlapped curve has 2*10-1 points. I guess there should be a simple solution but I couldn’t find it.