A steam turbine with at least two steam chambers, which are enclosed by a basically tubular casing and which are separated from each other by means of at least one partition which is arranged in the casing, is characterized according to the invention in that the partition is formed from at least two flat partial surfaces which are formed in an inclined manner relative to each other. The wafer mapping system includes a plurality of mirrors and sensors used to detect the positions of the wafers. It can further comprise generating the artificial lighting input in the building area and carrying out the steps of obtaining, comparing and calculating a second time to determine a quality of the calculating and modify the generating. Each document folder is a folder in which content of a specified type may be read and saved. The side gap is nonmagnetic and includes a first side gap and a second side gap.