A machining program is read in and interpreted and a determination is made as to whether the amount of movement called for by a block of commands is larger or smaller than a minimum amount of movement that is established by a feed speed and a one sampling period of a numerical control apparatus. The inner wall of the combustion chamber adjoins the cooling device and contains depressions formed in such a way that the stable outer layer of the stream of gas that forms in the proximity of the inner wall of the combustion chamber during operation of the combustion chamber is destabilized in the area of the depressions. A method and apparatus for producing such a multi-layered film and a preferred use as a transmucosal galenic formulation are also disclosed. The first reflective surface is positioned to reflect the electromagnetic radiation conditioned by the correcting plate. The nozzle inlet is upstream from the mold cavity inlet.