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adopted aerial aircraft airfield alternating current boiler Britain British British Electricity Authority cable capacity carried cent circuits civil engineering coal concrete connexion considerable construction consumption cost course cycle deflexion Diesel direct current district heating docks economic efficiency Electrical Engineers equipment experience factor factor of safety feet fuel gas turbine gear heat important improved increased industry installed Institution load locomotive London Lord Reith machines maintenance manufacture masts mechanical engineering megawatts ment methods million modern motor necessary obtained operation paper plant possible power stations present pressure problem production pumps radio rail railway reduced reheat road runway scheme sewage ships signal speed standard steam steam turbine steel structure superheater supply technical colleges temperature tion track circuit traction traffic transmission tunnels United valves vehicles vessels voltage water-tube boilers