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Machines for high precision assembling; machine tools; parts of the afore-mentioned machines as far as included in class 7; housings (parts of machines); hand held electrical, pneumatic and hydraulic tools as far as included in class 07; pistons; machines/automata for piston ring assembly, piston circlip assembly, piston pin assembly, piston conrod assembly, piston cover plate assembly and bearing assembly; pistons for machines and motors; control devices for machines and motors; robots; transmission components except for land vehicles. Measuring, checking/supervision, control and regulating instruments and apparatus; mechanic measuring and control instruments; machines for the automatic measuring of pistons, like piston offset, ring groove height, ring groove root diameter, compression height, valve pocket depth and position, piston pin bore diameter, piston diameters, piston ovality; machines for automatic inspection of pistons, like ultrasonic check for the adhesion of the ring carrier, eddy current check of the combustion bowl rim and piston pin bore, optical inspection of the piston and piston rings, high pressure adhesion check of the piston coating.