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作业 维修 : 30 phrases in 12 subjects |
| Agriculture | 1 |
| Automobiles | 3 |
| Aviation | 6 |
| Business | 2 |
| Construction | 1 |
| Economy | 2 |
| Management | 1 |
| Rail transport | 3 |
| Reliability | 2 |
| Space | 3 |
| Technology | 5 |
| Telecommunications | 1 |
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