7 Machines, namely, aircraft engines, gas turbine engines not for land vehicles, turbochargers for machines and centrifuges; motors and engines except for land vehicles; machine coupling and transmission components except for land vehicles; machine parts, namely, bearings; turbines; impellers, namely, pump impellers, water jet engine impellers and gas impellers for turbine engine not being land vehicle engine; compressor wheels for turbochargers; engine exhaust systems comprised of pipes, collector, and muffler; exhaust manifolds for engines; turbochargers and turbo wheels for aircraft engines not being for land vehicles; exhaust silencers for motors and engines; turbine and compressor blades and vanes for aero engines; gas turbine engines not being engines for land vehicles; industrial gas turbine engines; gas turbines engines used for the generation of electricity not for land vehicles; turbine and compressor blades and vanes for use in aerospace and industrial gas turbine engines; parts, fittings, fabrications and accessories for any of the aforesaid goods, namely, fan blades for aircraft engines and gas turbines