7 Engines in the nature of mechanical and electrical power generation devices for stationary power generation, namely, internal combustion engines in the nature of spark-ignition engines, compression-ignition engines, and reciprocating engines comprised primarily of direct-injection two and four-stroke engines, gas turbine engines not for land vehicles, steam turbines, gas turbine combined cycle power generators; generators of electricity, namely, Rankine cycle power generators and magnetohydrodynamic power generators; Marine vehicle engines, namely, boat motors, internal combustion engines for boats, internal combustion engines in the nature of spark-ignition, compression-ignition, and reciprocating engines comprised primarily of direct-injection two and four-stroke engines, gas turbines not for land vehicles, steam turbines, gas turbine combined cycle power generators, generators of electricity, namely, Rankine cycle power generators and magnetohydrodynamic power generators, and fluidic thrusters for machinery; Submarine vehicle engines; Air vehicle engines, namely, aircraft gas turbine engines and reciprocating engines; Space vehicle engines, namely, rocket engines, hybrid gas turbine rocket engines, and fluidic thrusters for machinery; Fuel based power generators; Propulsion systems for marine vehicles, submarine vehicles, air vehicles, and space vehicles comprised primarily of turbine engines, fluid inlets fluid compressors, fluid chemical reactors, fluid expanders, fluid transporters, fluid directors, fluid nozzles, propellers, shafts, clutches, fans, bearings, heat exchangers, lubrications systems, seals, valves, control systems, instrumentation, flanges, fasteners, wiring, electrical AC components, and electrical DC components; generators of electricity, namely, Rankine cycle power generators and magnetohydrodynamic power generators for land vehicles