AIR CYLINDERS, DASH-POTS, AIR-AND HYDRAULICALLY-OPERATED INTENSIFIERS FOR FLUIDS, AIR PRESSES, HYDRAULIC POWER UNITS FOR DRIVING ROTARY HYDRAULIC PUMPS, AIR-OPERATED MACHINERY AND HYDRAULICALLY-OPERATED MACHINERY SUITABLE FOR ONE OR MORE OF THE FOLLOWING OPERATIONS: PRESSING, ASSEMBLY, STAKING AND SWAGING