I have imported a geometry which is in parasolid form, the geometry is shown in below attached file. As you can see this geometry has 3 sections, 3 lines separating the sections, when i click on this geometry one part is selected at a time. What i want is to make it as a one model, like all these lines vanishes and when i click on the model whole geometry will be selected. what should i do? anyone help would be appreciated.