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| 积算船位; 船位推算位置; 无风无流的推算船位; 推算船位; 航位推算装置 | |||
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| 推测测算航行位置 | |||
| 推测航行位置; 推算船位 | |||
| 积算船位 | |||
| dead-reckoning position: 5 phrases in 2 subjects |
| Shipbuilding | 3 |
| Technology | 2 |
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