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| 国家地球物理数据中心美 | |||
| 美国国家地球物理数据中心 | |||
| English thesaurus | |||
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| NGDC | |||
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National Geophysical Data Center : 7 phrases in 4 subjects |
| Earth sciences | 2 |
| Geophysics | 2 |
| Space | 1 |
| United States | 2 |
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