This book is recommended for workers engaged in the repair of machine parts. It provides the latest information on the techniques and technology of part processing. Installations in which electrical energy is converted into other types with the simultaneous implementation of technological processes resulting in a change in matter are called electrotechnological installations. It should be noted that electrotechnological processes use the properties of the processing substances and materials themselves: electrical conductivity, magnetic permeability, dielectric permittivity, thermal conductivity, heat capacity, latent heat of fusion or vaporization, heat content, enthalpy.