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| 实际维修时间 | |||
| 有效维修时间 | |||
| 主动维护时间 | |||
| 有效维护时间 | |||
| active maintenance time: 10 phrases in 6 subjects |
| Automobiles | 1 |
| Business | 1 |
| Information technology | 1 |
| Reliability | 3 |
| Space | 2 |
| Telecommunications | 2 |
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