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| Котел паровой А | |||
| Boiler A: 106 phrases in 15 subjects |
| American usage, not spelling | 3 |
| Construction | 7 |
| Energy industry | 7 |
| Energy system | 1 |
| Figurative | 1 |
| General | 10 |
| Makarov | 21 |
| Mechanic engineering | 1 |
| Molikpaq | 30 |
| Nautical | 5 |
| Oil processing plants | 3 |
| Rail transport | 6 |
| Shipbuilding | 4 |
| Technology | 6 |
| Thermal engineering | 1 |