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| 时间记录 | |||
| 工时记录 | |||
| time log: 38 phrases in 13 subjects |
| Air defense | 2 |
| Aviation | 2 |
| Drilling | 3 |
| Earth sciences | 1 |
| Engineering geology | 2 |
| Geology | 1 |
| Geophysics | 14 |
| Oil / petroleum | 3 |
| Oil processing plants | 1 |
| Shipbuilding | 4 |
| Space | 1 |
| Technology | 3 |
| Telecommunications | 1 |
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