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预 热器 : 250 phrases in 21 subjects |
| Agriculture | 2 |
| Animal husbandry | 1 |
| Architecture | 1 |
| Automobiles | 32 |
| Chemistry | 4 |
| Compressors | 1 |
| Ecology | 1 |
| Electronics | 12 |
| General | 3 |
| Metallurgy | 44 |
| Nautical | 7 |
| Oil / petroleum | 6 |
| Oil processing plants | 1 |
| Plastics | 3 |
| Polymers | 1 |
| Refrigeration | 4 |
| Shipbuilding | 7 |
| Solar power | 2 |
| Technology | 115 |
| Textile industry | 2 |
| Thermal Energy | 1 |
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