Is there a function in pygmsh that facilitates joining 3D meshes?

[Chaztikov]

Hi, thanks for taking the time to read this. It's more of a question than an issue (is there a better place to ask?)

I would like to generate a 3D mesh corresponding to the attached image (bifurcated channel, with stenosis).

I am not sure how I would go about doing this in pygmsh.

I could generate three cylinders by (separately) specifying points in 2D and using pygmsh.geo.Geometry().revolve

Following that, is some function within pygmsh that I should consider using in order to join the three 3D components?

Thanks!