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| zone heating: 30 phrases in 14 subjects |
| Caspian | 1 |
| Construction | 5 |
| Energy industry | 1 |
| Firefighting and fire-control systems | 1 |
| Metallurgy | 2 |
| Pipelines | 1 |
| Plastics | 2 |
| Polygraphy | 1 |
| Polymers | 1 |
| Refrigeration | 5 |
| Silicate industry | 1 |
| Technology | 5 |
| Thermal engineering | 2 |
| Welding | 2 |
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