IC 007. US 013 019 021 023 031 034 035. G & S: Machine parts, namely, boiler tubes and steam manifolds; components for steam and gas turbines not for land, sea or air vehicles, namely, casings rotor shafts, stator and rotor blades, and supports for blades
IC 011. US 013 021 023 031 034. G & S: Components of boilers, steam generators, and heat exchangers not being machine parts, namely, waterwall panels and tubes used therewith, superheaters and tubes used therewith, reheaters and tubes used therewith, drums, steam separators, steam headers, steam manifolds, steam pipeworks, tube bundles, tube sheets, and metal covering for heat exchanger and steam generator shells
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