energy efficiency of the standard management
energy density of the hydrogen storage system
energy consumption of the unit output-value
energy consumption of the process
energy consumption of the aprtment
Energy conservation measures in the United States
energy conservation goal in the 11th-Five-Year Plan
energy conservation goal in the 11~(th)-Five-Year Plan
Energy budget on the ground surface
efficiency of the traveler
efficiency of the system
efficiency of the section
efficiency of the radiator