 |
| glass sand: 18 phrases in 7 subjects |
| Architecture | 1 |
| Chemistry | 1 |
| Construction | 1 |
| General | 3 |
| Nautical | 1 |
| Silicate industry | 8 |
| Technology | 3 |
|
| glass sand: 18 phrases in 7 subjects |
| Architecture | 1 |
| Chemistry | 1 |
| Construction | 1 |
| General | 3 |
| Nautical | 1 |
| Silicate industry | 8 |
| Technology | 3 |