Cleaning of engines, turbines and aircraft; washing of engines, turbines and aircraft; maintenance and repair of cleaning machines, washing machines, engines, turbines, aircraft, combustion hardware, combustion systems, fuel nozzles and end covers; maintenance and repair of power generation equipment; maintenance and repair of washing apparatus and cleaning machines; rental of washing apparatus and cleaning machines; hire of washing apparatus and cleaning machines; cleaning by water jetting, namely, power washing services; maintenance, repair, servicing, cleaning and washing of gas turbines; maintenance, repair, servicing, cleaning and washing of engines; maintenance, repair, servicing, cleaning and washing of aeronautical engines; information, advisory and consultancy services relating to all of the aforementioned services