A General Solid can be defined using a standard dialog, from which Boundary Surfaces can be picked graphically (individually, or using a Quadrilateral or Rhomboid Selection Tool).
Boundary Surfaces that define the 3D General Solid at listed numerically.
The Solid can be declared to be a Cavity (opening, hole), and not to be a part of the transport domain, using the check box Cavity.
The Edit Solid dialog window (for 3D-General Solids) has four tabs: General Tab, FE-Mesh Tab, Integrated Objects tab, and an Info tab.
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