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| 维修和操作 | |||
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maintenance and operating : 16 phrases in 9 subjects |
| Accounting | 1 |
| Automobiles | 2 |
| Aviation | 3 |
| Business | 2 |
| Earth sciences | 2 |
| Economy | 1 |
| International trade | 1 |
| Nautical | 1 |
| Technology | 3 |
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