Turbines other than for land vehicles; gas turbines; air compressors; steam turbines; water turbines; turbine and air compressor parts; precision-cast and forged parts for turbines and air compressors, namely, turbine blades and air compressor blades; parts for hot gas turbines in contact with hot gases; turbine parts, namely, diffuser segments; turbine parts, namely, stators and rotors; parts of gas turbines, namely, air filters, silencers, machine housings, combustion chamber housings, gas ...