23 ROLLING MILL PLANTS; ROLLING MILL ROLLERS; AUXILIARY MACHINES FOR ROLLING MILLS; SHEARS FOR CUTTING METAL BLOCKS AND METAL SHEETS, METAL RODS, AND PIPES; FORGING MACHINES; COUPLINGS, GEARS AND BEARINGS FOR ROLLING MILLS; PRESSURE FLUID AND COMPRESSED AIR PLANTS; AND PARTS FOR ALL THE ABOVE-MENTIONED SPECIAL MACHINES