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- ecosystem services 1
- ecotourism 3
- ectangular wave guide 1
- eddy current metal detector 1
- Edge Devices 1
- edge effect 1
- edge of inclination 1
- education 1
- educational process 1
- educational software tool 1
- effective charge 1
- effectiveness 1
- effectiveness of activities 1
- efficiency 15
- efficiency assessment 1
- efficiency control 1
- efficiency factor 1
- efficiency of economic activity 1
- efficiency of labor 1
- efficiency of marketing costs 1