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| oil bearing rock; petrologen | |||
| kerogen | |||
| kerabitumen (质); kerogen (质) | |||
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| kerogen shale | |||
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| kerogen | |||
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| kerogen | |||
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油 母岩 : 7 phrases in 5 subjects |
| Architecture | 1 |
| General | 1 |
| Geology | 1 |
| Oil / petroleum | 1 |
| Technology | 3 |
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