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dust-filter : 52 phrases in 20 subjects |
| Automobiles | 2 |
| Caspian | 3 |
| Cement | 4 |
| Construction | 4 |
| Electronics | 2 |
| Energy industry | 1 |
| Flour production | 4 |
| Food industry | 3 |
| Forestry | 1 |
| Industrial hygiene | 3 |
| Information technology | 1 |
| Makarov | 2 |
| Natural resourses and wildlife conservation | 5 |
| Nuclear physics | 3 |
| Occupational health & safety | 2 |
| Office equipment | 1 |
| Oil / petroleum | 5 |
| Oilfields | 1 |
| Technology | 4 |
| Transport | 1 |