PUMPS, IN PARTICULAR HYDRAULIC PUMPS; DRIVING MACHINES, IN PARTICULAR HYDRAULIC MOTORS, HYDRAULIC CYLINDERS, PISTON-CYLINDER UNITS; TRANSMISSIONS, IN PARTICULAR HYDRAULIC TRANSMISSIONS; VALVES, IN PARTICULAR HYDRAULIC VALVES; HYDRAULIC AGGREGATES-NAMELY, DRIVING AGGREGATES-NAMELY, A RESERVOIR AND A PUMP; OUTPUT AGGREGATES-NAMELY, HYDRAULIC MOTORS AND HYDRAULIC CYLINDERS; HYDRAULIC DEVICES-NAMELY, HYDRAULIC RESERVOIRS, HYDRAULIC ARRANGEMENTS-NAMELY, A PUMP, MOTOR OR CYLINDER, CONNECTING CONDUI...