power input: 58 phrases in 20 subjects |
Antennas and waveguides | 1 |
Communications | 1 |
Construction | 2 |
Earth sciences | 2 |
Electric motors | 1 |
Electronics | 16 |
General | 3 |
Health care | 1 |
Magnetics | 1 |
Measuring instruments | 2 |
Mechanic engineering | 1 |
Medical appliances | 2 |
Microelectronics | 3 |
Physics | 1 |
Power system protection | 1 |
Refrigeration | 1 |
Satellite communications | 1 |
Technology | 16 |
Vacuum tubes | 1 |
Радиоактивное излучение | 1 |