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- encouragement 1
- end consumers 1
- endogenous factor 1
- energetic 1
- energia din surse regenerabile 1
- energy 10
- energy analysis 1
- energy and lubricants 1
- energy and resource-saving technologies 1
- energy and water consumption 1
- energy assessment 1
- energy audit 2
- energy balance 1
- energy base 1
- energy capacity 2
- energy carriers 1
- energy conservation 1
- energy consumption 17
- energy conversion 3
- energy costs 6