 |
| flue boiler: 30 phrases in 10 subjects |
| Construction | 3 |
| Energy industry | 3 |
| Mechanic engineering | 8 |
| Nautical | 3 |
| Oil and gas | 1 |
| Public utilities | 1 |
| Rail transport | 1 |
| Shipbuilding | 3 |
| Technology | 5 |
| Thermal engineering | 2 |
|
| flue boiler: 30 phrases in 10 subjects |
| Construction | 3 |
| Energy industry | 3 |
| Mechanic engineering | 8 |
| Nautical | 3 |
| Oil and gas | 1 |
| Public utilities | 1 |
| Rail transport | 1 |
| Shipbuilding | 3 |
| Technology | 5 |
| Thermal engineering | 2 |