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Catia Importing Step to Closed Shell


New member
I am having to translate some models from Pro/E to Catia and when I import the step files into Catia sometimes the model says MANIFOLD_SOLID_BREP and sometimes it says CLOSED_SHELL in the tree. Can anyone explain to me what the difference is between the two and are both forms in fact solids or is the closed shell surfaces?

Thank you in advance.


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