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| maintanance cost | |||
| cost of attendance; cost of maintenance | |||
| cost of service | |||
| maintenance expenses | |||
| maintenance cost | |||
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维护成本 : 8 phrases in 5 subjects |
| Aviation | 2 |
| Electronics | 1 |
| Finances | 1 |
| Technology | 1 |
| Water resources | 3 |
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