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- energy balance 3
- energy branch 1
- energy certificate 5
- energy certification 1
- energy characteristics of channels 1
- energy characteristics of radio channels 1
- energy concept 1
- energy conservation 2
- energy conservation in usages 1
- energy conservation in usages 1
- energy consumption 19
- energy consumption optimization 1
- energy cost reduction 1
- energy costs 9
- energy efficiency 39
- energy efficiency class 10
- energy efficiency measures 1
- energy efficiency mode 1
- energy efficiency of locomotives 1
- energy efficiency of train operation 1