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- Electric lines
- Design and construction 10
- Poles and towers 8
- Carrier transmission 6
- Electromagnetic fields 6
- Structural engineering 6
- Electromagnetic theory 4
- Electromagnetic waves 4
- Mathematics 4
- Transmission 4
- Broadband communication systems 2
- Carriers 2
- Data processing 2
- Electric power distribution 2
- Electric power transmission 2
- Electric resistance 2
- Electric substations 2
- Electric utilities 2
- Electrical engineering 2
- Electromagnetic compatibility 2
- Electronic apparatus and appliances 2
- Electronic circuit design 2
- Environmental aspects 2
- Equipment and supplies 2
- Health aspects 2
- Lattice theory 2
- Mathematical models 2
- Overhead electric lines 2
- Research 2
- Safety regulations 2
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