TWOSIDED

(experimental) copy the boundary entity re-orient it, and give other attributes to it

EXPERIMENTAL only. Example: The alias "box" refers to a boundary element for CHAMBER1 and at the same time re-orientated to a boundary element for CHAMBER2
begin_alias{} "box" = " BC$...$ ACTIVE$...$ IDENT%...% MAT$...$ TOUCH%...% MOVE$...$ CHAMBER1 TWOSIDED BC$...$ ACTIVE$...$ IDENT%...% MAT$...$ TOUCH%...% MOVE$...$ CHAMBER2 " end_alias