9 Scientific, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision) apparatus and instruments; laser-based measuring apparatus and instruments; electrical controllers, electro-mechanic regulators, electro-hydraulic regulators, relating to the following purposes, use in drive technology, control technology and regulating technology, measuring devices, electric, electrical control apparatus, electric checking (supervision) apparatus, especially, sensors on the basis of laser technology, radar sensors, relating to the following purposes, controlling the running of a belt, measuring piece goods or extruded materials, quality assurance of metal webs or metal slabs or continuous casting materials; electronic cameras; digital sensors and ultrasound sensors and optical sensors for web guiding, especially based on laser technology, infrared spectroscopy and laser-induced fluorescence spectroscopy for quality assurance; machines for measuring and visualising oil films on (in particular running) material webs, machines for measuring and visualising oil films on piece goods; inductive sensors; combined regulators for web guiding; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity; equipment, instruments, in relation to the following fields, length, thickness, width and position measurement, strip width measurement in the manufacture and processing, relating to the following fields, material webs, piece goods, especially, bands of metal, metal slabs, camera-based apparatus, laser-based sensor apparatus for a contour measurement of metal parts and recording by means of sensors or cameras; apparatus for recording, transmitting and reproducing images and image data; data-processing equipment and computers; computer programs and systems for image processing in manufacturing processes for metal slabs or material webs, in particular metal belts