|
shielding materials : 7 phrases in 6 subjects |
| Firefighting and fire-control systems | 1 |
| Makarov | 1 |
| Mathematics | 1 |
| Medical appliances | 2 |
| Nautical | 1 |
| Telecommunications | 1 |
|
shielding materials : 7 phrases in 6 subjects |
| Firefighting and fire-control systems | 1 |
| Makarov | 1 |
| Mathematics | 1 |
| Medical appliances | 2 |
| Nautical | 1 |
| Telecommunications | 1 |