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| energy efficiency system | |||
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能效 系 统 : 37 phrases in 11 subjects |
| Air defense | 2 |
| Automobiles | 1 |
| Aviation | 5 |
| Business | 4 |
| Economy | 1 |
| Electronics | 7 |
| Nautical | 2 |
| Project management | 1 |
| Shipbuilding | 2 |
| Space | 11 |
| Technology | 1 |
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