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工程维护 : 39 phrases in 12 subjects |
| Automobiles | 1 |
| Aviation | 12 |
| Business | 1 |
| Communications | 3 |
| Economy | 1 |
| Electronics | 7 |
| Engineering geology | 1 |
| Hydroelectric power stations | 2 |
| Management | 1 |
| Space | 2 |
| Technology | 4 |
| Telecommunications | 4 |
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