effective height: 55 phrases in 13 subjects |
Analytical chemistry | 3 |
Antennas and waveguides | 5 |
Artillery | 2 |
Astronautics | 1 |
Ecology | 5 |
Energy industry | 2 |
Makarov | 1 |
Medical appliances | 1 |
Military | 1 |
Nautical | 1 |
Oil and gas | 21 |
Public utilities | 1 |
Technology | 11 |