 |
| filter chamber: 8 phrases in 6 subjects |
| Antennas and waveguides | 1 |
| Construction | 1 |
| Medical | 3 |
| Metallurgy | 1 |
| Natural resourses and wildlife conservation | 1 |
| Technology | 1 |
|
| filter chamber: 8 phrases in 6 subjects |
| Antennas and waveguides | 1 |
| Construction | 1 |
| Medical | 3 |
| Metallurgy | 1 |
| Natural resourses and wildlife conservation | 1 |
| Technology | 1 |