The injection system comprises a pump designed to send fuel at high pressure to an accumulation volume, for example formed by a common rail, for supplying a plurality of injectors. The first lens and the third lens are fixed relative to the optical axis direction during magnification change, and the second lens and the fourth lens are moved in the optical axis direction during magnification change. Software applications for MES-systems are constructed for automation systems, for industrial controls and for office applications. Objects within the request can be embedded within each other with different encryption and compression applied to the different objects.