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| |||
| master unit | |||
| main set; major unit | |||
| principal mechanical components | |||
| 主机组: 23 phrases in 12 subjects |
| Aviation | 2 |
| Electric machinery | 1 |
| Electronics | 2 |
| International Monetary Fund | 2 |
| Nautical | 1 |
| Oil / petroleum | 3 |
| Project management | 1 |
| Shipbuilding | 3 |
| Space | 1 |
| Steel production | 1 |
| Technology | 5 |
| Wind Energy | 1 |
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