ABSTRACT
In the theory of part surface generation, part surfaces to be machined are commonly analytically described in a certain reference system associated with the surface. The majority of parts to be machined are bounded by two or more surfaces (see Chapter 1). Each of the part surfaces is usually represented in a reference system associated with the corresponding surface. This is convenient because analytical representation of a surface becomes simpler when the surface is specified in a particular reference system. Ultimately, it is necessary to analytically describe the whole part, namely, a set of part surfaces, in a coordinate system that is common to all of the part surfaces.
