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| heat balance diagram; steam and feed flow diagram | |||
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热线 图 : 16 phrases in 9 subjects |
| Agriculture | 1 |
| Construction | 1 |
| Electronics | 2 |
| Genetics | 1 |
| Oil / petroleum | 2 |
| Shipbuilding | 1 |
| Space | 1 |
| Technology | 6 |
| United Nations | 1 |
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