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| 富煤气; 高发热值煤气 | |||
| 富气 | |||
| rich gas: 25 phrases in 11 subjects |
| Aviation | 2 |
| Chemistry | 1 |
| Compressors | 3 |
| Ecology | 1 |
| General | 2 |
| Geology | 1 |
| Metallurgy | 5 |
| Oil / petroleum | 2 |
| Oil processing plants | 3 |
| Space | 1 |
| Technology | 4 |
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