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| one-pipe: 38 phrases in 9 subjects |
| Construction | 14 |
| Energy industry | 1 |
| General | 2 |
| Makarov | 2 |
| Refrigeration | 1 |
| Technology | 1 |
| Thermal engineering | 14 |
| Transport | 2 |
| Well control | 1 |
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