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suction filter : 31 phrases in 16 subjects |
| Cement | 1 |
| Chemistry | 1 |
| Flour production | 1 |
| Food industry | 1 |
| General | 6 |
| Karachaganak | 1 |
| Makarov | 1 |
| Molikpaq | 3 |
| Occupational health & safety | 1 |
| Oil / petroleum | 2 |
| Oil and gas | 1 |
| Oil processing plants | 1 |
| Paint, varnish and lacquer | 2 |
| Sakhalin | 1 |
| Technology | 6 |
| Transport | 2 |