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丁烷-丁烯 : 31 phrases in 11 subjects |
| Chemistry | 4 |
| Electronics | 5 |
| General | 3 |
| Metallurgy | 1 |
| Oil / petroleum | 4 |
| Oil and gas | 1 |
| Oil processing plants | 3 |
| Perfume | 2 |
| Plastics | 1 |
| Polymers | 6 |
| Technology | 1 |
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