closed structure : 23 phrases in 13 subjects |
Antennas and waveguides | 1 |
Astronautics | 4 |
Electronics | 1 |
General | 1 |
Makarov | 4 |
Microelectronics | 1 |
Military | 1 |
Nanotechnology | 3 |
Oil / petroleum | 1 |
Physics | 1 |
Refrigeration | 1 |
Technology | 3 |
Thermal engineering | 1 |