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butene : 46 phrases in 13 subjects |
| Automobiles | 3 |
| Chemistry | 12 |
| Earth sciences | 1 |
| General | 1 |
| Oil / petroleum | 7 |
| Oil and gas | 1 |
| Oil processing plants | 2 |
| Perfume | 3 |
| Plastics | 5 |
| Polymers | 3 |
| Shipbuilding | 1 |
| Technology | 6 |
| Water resources | 1 |
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