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| 下白垩统 | |||
| 早白垩世【地】 | |||
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| 下白垩纪 (Cr₁) | |||
| 下白垩纪; 下白垩纪〔系〕 | |||
| lower Cretaceous: 2 phrases in 2 subjects |
| Geology | 1 |
| Technology | 1 |
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