The invention relates to stable ophthalmic preparations including the penetrant antiphlogistic diclofenac or salts thereof and the penetrant antibiotic ofloxacin present in the form of the racemate, an enantiomer, particularly levofloxacin, or the corresponding hydrochloride thereof. With the engine, reduction of NOx emission by EGR can be achieved without incurring a deterioration in engine durability by enabling operation of the engine with the proper EGR rate over all operating ranges of the engine by making it possible to compensate for reduction in EGR amounts due to a reduced DPF pressure difference which occurs when the recovering operation of the DPF is performed. In variations, an electric motor is provided to selectively move the oven door between the open and closed positions. The dielectric layer includes an at least substantially porous dielectric material doped with at least one dopant. The diode includes a second area including on the substrate a thick conductive track supporting at least two second welding balls, said first and second welding balls defining a plane parallel to the substrate plane.