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| 海底地貌仪 | |||
| 扫描海底声呐 | |||
| 海底扫描声纳 | |||
| 海底扫描声呐 | |||
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scanning ocean bottom sonar : 4 phrases in 3 subjects |
| Earth sciences | 2 |
| Navigation | 1 |
| Space | 1 |
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