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dustless : 26 phrases in 15 subjects |
| Astronomy | 1 |
| Automobiles | 1 |
| Chemistry | 2 |
| Construction | 3 |
| Food industry | 2 |
| Leather | 1 |
| Makarov | 1 |
| Mining | 3 |
| Natural resourses and wildlife conservation | 1 |
| Oil / petroleum | 2 |
| Polygraphy | 1 |
| Pulp and paper industry | 1 |
| Technology | 3 |
| Thermal engineering | 1 |
| Transport | 3 |