Abstract: A sensor unit for recording the direction of rotation of a wheel is embodied to record a variable that is characteristic for a direction of flow of an air stream in a tire of the wheel. To determine a side of a vehicle on which a wheel is disposed, a variable is recorded which is characteristic for a direction of flow of an air stream in a tire of the wheel. Further a direction of movement and an acceleration of the vehicle is recorded. The side of the vehicle is determined depending on the variable, the direction of movement of the vehicle and the acceleration of the vehicle.

Abstract: A method for back-etching of tungsten-coated substrate surfaces in the production of large-scale integrated circuits includes pressing a substrate against a cooled specimen holder during back-etching with a retaining ring being disposed on an edge of the substrate and only locally retaining the edge of the substrate with the retaining ring at retaining locations distributed over the circumference of the retaining ring. The retaining locations are backup-free relative to etching products liberated in the back-etching, causing the etching products to flow past the retaining locations and be purposefully deposited outside the substrate surface.

Abstract: Transfer cylinder for conveying a sheet from one printing unit to another, comprising a cylindrical drum, a row of rubber suction pads for temporarily holding the sheet, the row of suction pads being disposed at an end of a sheet format length on the cylindrical surface of the drum, the rubber suction pads extending in axial direction of the drum, and paper supports disposed in vicinity of the rubber suction pads for respectively applying suction to and supporting the sheet.