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| marine operation; offshore operation | |||
| operation on sea | |||
| operation of the sea | |||
| 海上作业: 25 phrases in 6 subjects |
| Aviation | 4 |
| Drilling | 1 |
| Earth sciences | 1 |
| Navigation | 5 |
| Oil / petroleum | 4 |
| Technology | 10 |
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