 |
| low-operating: 13 phrases in 10 subjects |
| Antennas and waveguides | 1 |
| Construction | 2 |
| Economy | 1 |
| Electrochemistry | 1 |
| Electronics | 1 |
| Energy industry | 1 |
| Energy system | 2 |
| Military | 1 |
| Security systems | 2 |
| Technology | 1 |
|
| low-operating: 13 phrases in 10 subjects |
| Antennas and waveguides | 1 |
| Construction | 2 |
| Economy | 1 |
| Electrochemistry | 1 |
| Electronics | 1 |
| Energy industry | 1 |
| Energy system | 2 |
| Military | 1 |
| Security systems | 2 |
| Technology | 1 |