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| 使用质量; 使用性能 | |||
| 使用特性; 服役性能 | |||
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service property : 6 phrases in 6 subjects |
| Aviation | 1 |
| Business | 1 |
| China | 1 |
| Consulting | 1 |
| General | 1 |
| United Nations | 1 |
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