Disclosed is a polymer material of low relative permittivity obtained through copolymerization of a monomer composition that contains, as monomers, a fumaric diester and an epoxy group-having acrylate. The module includes a fuel pump 16 for pumping fuel to the engine. The insulating sheath part has a pair of cut-out parts. Even though the radiation source is disposed on the internal side of the fixing member, the fixing member can perform good surface heating in a good heat response. Various other methods, systems, and computer-readable media are also disclosed.