In this definition you can model a parametric surface which is basically controlled by a series of circles with different radiuses and locations. At the end you can have the sections for fabrication.
In this definition you can model a parametric joint connection for a network of lines. The connection can be 3d printed and by defining sleeves for the pipes you can insert them in the nodes.
In this defintion you can model a parametric wave like structure and two waffle parts which can hold those sections together.