Air compressors; Compressed air pumps; Compressing machines; Cylinders for motors and engines; Hydraulic engines and motors; Hydraulic pumps; Hydraulic valve actuators; Machine tools, namely, clamps for use in the precision clamping of work pieces; Manipulators for forging presses and for forging machines; Mechanical presses for metalworking; Metalworking machine tools; Pistons for engines; Pumps for machines; Shaft couplings as parts of machines; Valves for pumps