[SOLVED] intersect mass and solve adjacency issue

I have three adjacent closed breps.

However, I’m unable to get the two interior walls as shown below:

The three breps are defintely overlapping over those two interior walls because if I bake the breps into Rhino and use solid union to join them, those two surfaces will be removed as shown below.
Image 2

I wonder what is causing this issue… and I have several other groups of breps having the same problem.

Appreciate your kind suggestion. (GH file attached)


unable to identify interior wall through intersect zone surfaces.gh (495.3 KB)

… seems I made a mistake for not using Meters as unit. The components are working correctly as expected.

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