7 MACHINES AND PARTS FOR MACHINES, NAMELY AIRCRAFT ENGINES; ENGINES NOT FOR LAND VEHICLES; PARTS AND FITTINGS FOR ENGINES NOT FOR LAND VEHICLES, INDUSTRIAL GAS TURBINES; HYDRAULIC TURBINES; PARTS FOR OIL EXTRACTION AND OIL REFINERY MACHINES AND INSTALLATIONS, NAMELY, PULVERIZER RINGS AND BALLS, ROLLS, GRINDING TABLES, PULVERIZER THROAT PLATES, PULVERIZER SUNDRIES, VALVE BODIES, VALVE ADAPTERS, VALVE BALLS, INDUSTRIAL BEARING RINGS, BEARER SPACING RINGS, PIPE JOINT CASINGS, CONNECTORS FOR SUB-SEA OIL EXPLORATION, GASKET RINGS, WELL HEAD AND OIL DISTRIBUTION RINGS AND FORGINGS, STABILIZER FORGINGS, VALVE BODY FORGINGS, SPECIAL FLANGED FORGINGS, BLOW-OUT PREVENTER RINGS AND FORGINGS, TOOL STEEL SLITTER RINGS, TURRENT RINGS, ROLLED NECK RINGS, DAMPER RINGS, PRESSURE VESSEL SEALINGS, STUB SHAFT FORGINGS, WELLHEAD BLOCKS FOR SUB-SEA AND SURFACE APPLICATIONS IN THE OIL INDUSTRY, STABILIZERS AND REAMERS FOR THE OIL INDUSTRY, SPECIAL FLANGES, DRIVE SHAFTS, GASKETS; CASINGS FOR MEDICAL DIAGNOSTIC EQUIPMENT; PARTS FOR CHEMICAL PRODUCTION MACHINERY AND INSTALLATIONS, NAMELY, BEARING RINGS, TURBINE DISCS, COMPRESSOR DISCS, SHAFTS, SEALS, VALVE BODIES, VALVE ADAPTERS, VALVE BALLS, INDUSTRIAL BEARING RINGS, BEARING SPACER RINGS, GASKET RINGS. STABILIZER FORGINGS, SPECIAL FLANGE FORGINGS, TOOL STEEL SLITTER RINGS, TURRET RINGS, ROLLED NECK RINGS, DAMPER RINGS, PRESSURE VESSEL SEALINGS, EXTERNAL GEAR RINGS AND FORGINGS, CRUSHER AND STABILIZER SHAFTS, STUB SHAFT FORGINGS, GLAND SEGMENT RINGS, DRIVESHAFTS, PISTON CROWNS, DIFFERENTIAL WHEELS, LEVERS, PINIONS, BEARING RINGS, SHAFTS, CROWN WHEELS, FLANGES, CRUSHER MACHINE SPRINGS, ANNULAR SPRINGS, EPICYCLIC GEAR FORGINGS, ROLLED RINGS, VERTICAL SPINDLE RAW MILL CRUSHER PARTS, MILL LINERS, DIAPHRAGM PLATES, GRATE PLATES, KILN TYRES, SUPPORT ROLLERS, HEAT RESISTANT KILN PARTS, LINERS, CRUSHER HAMMERS, JAWS, CONES AND MANTLES, BLOW BARS, IMPACT PLATES, LINERS, BLADES, IMPELLERS, CONTROL CAGES, LINKS, WEAR PLATES AND HOODS; PARTS FOR POWER GENERATION PLANTS AND INSTALLATIONS, NAMELY, BEARING RINGS, TURBINE DISCS, COMPRESSOR DISCS, SHAFTS, SEALS, CENTRIFUGE DISCS, VALVE BODIES, VALVE ADAPTERS, VALVE BALLS, INDUSTRIAL BEARING RINGS, PULVERIZER RINGS, PULVERISER BALLS, ROLLS, GRINDING TABLES, PULVERISER THROAT PLATES, PULVERISER SUNDRIES, BEARING SPACING RINGS, GASKET RINGS, STABILIZER FORGINGS, VALVE BODY FORGINGS, SPECIAL FLANGED FORGINGS, TOOLS STEEL SLITTER RINGS, TURRET RINGS, ROLLED NECK RINGS, DAMPER RINGS, PRESSURE VESSEL SEALINGS, EXTERNAL GEAR RINGS AND FORGINGS, EXTERNAL GEAR RING FORGINGS, SPECIAL FLANGES, GASKETS, DIFFERENTIAL WHEELS, LEVERS, PINIONS, BEARING RINGS, SHAFTS, CROWN WHEELS, ANNULUS RINGS, ROLLED RINGS; METAL SPRINGS; MECHANICAL SEALS IN THE FORM OF MACHINE PARTS