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| граптолиты | |||
| граптолит (腔肠动物的一种化石) | |||
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笔 石 : 36 phrases in 8 subjects |
| Automated equipment | 1 |
| Biology | 2 |
| Construction | 1 |
| General | 14 |
| Geology | 3 |
| Ichthyology | 1 |
| Technology | 11 |
| Welding | 3 |
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